Whitescreen Server Error/Login Error

[SpartanBlockhead]

I have made a server for my brother and I to play on at home, and it was working fine until after I added the Sphax texture pack. When I try to join the server, it says "Logging In..." and the screen goes white and freezes shortly after. The command prompt says something like "SpartanBlocked disconnected:genericReason"

I tried deleting my player data, but it made no difference. So I tried clearing the cache to see if it would help. Now I can't even start Tekkit! When I try to log in, it says it's downloading minecraft.jar, then when it finishes it says "Update Failed!" and it keeps me in the launcher. What is going on, and how do I fix it?

INFO: I'm using (or was using) the development build, I forget exactly why...something was wrong with the recommended build. Also, I'm running Java 7. I tried deleting the tekkit folder in AppData, reinstalling the launcher, and it always does the same thing.

Here is the report from the launcher log:

[12:27:07] [sEVERE]------------------------------------------

[12:27:07] [sEVERE]Launcher is starting....

[12:27:07] [sEVERE]Launcher Build: '1.0.1.3'

[12:27:07] [sEVERE]Allocated 910.25 Mb of RAM

[12:27:07] [sEVERE]Java VM: '1.7.0-b147'

[12:27:07] [sEVERE]OS Version: '6.1'

[12:27:07] [sEVERE]Is 64-bit: 'true'

[12:27:07] [sEVERE][info] Downloading 'mirrors.yml' from 'http://mirror.technicpack.net/Technic/mirrors.yml'.

[12:27:08] [sEVERE]Starting download of 'http://mirror.technicpack.net/Technic/CHECKSUM.md5', with 3 trie(s) remaining

[12:27:08] [sEVERE]Copying: \temp\file8543602142938385264.tmp to: \launcher\CHECKSUM.md5

[12:27:08] [sEVERE]File Downloaded: \launcher\CHECKSUM.md5

[12:27:08] [sEVERE][info] Downloading 'modpacks.yml' from 'http://206.217.207.1/Technic/modpacks.yml'.

[12:27:10] [sEVERE]Starting download of '', with 3 trie(s) remaining

[12:27:10] [sEVERE]Starting download of '', with 3 trie(s) remaining

[12:27:10] [sEVERE]Starting download of '', with 3 trie(s) remaining

[12:27:10] [sEVERE]Starting download of '', with 3 trie(s) remaining

[12:27:10] [sEVERE]Starting download of '', with 3 trie(s) remaining

[12:27:10] [sEVERE]Starting download of '', with 3 trie(s) remaining

[12:27:10] [sEVERE]Starting download of '', with 3 trie(s) remaining

[12:27:10] [sEVERE]Starting download of '', with 3 trie(s) remaining

[12:27:10] [sEVERE]Starting download of '', with 3 trie(s) remaining

[12:27:10] [sEVERE]Starting download of '', with 3 trie(s) remaining

[12:27:10] [sEVERE]Starting download of '', with 3 trie(s) remaining

[12:27:10] [sEVERE]Starting download of '', with 3 trie(s) remaining

[12:27:10] [sEVERE]Starting download of '', with 3 trie(s) remaining

[12:27:10] [sEVERE]Starting download of '', with 3 trie(s) remaining

[12:27:10] [sEVERE]Starting download of '', with 3 trie(s) remaining

[12:27:10] [sEVERE]Starting download of 'http://206.217.207.1/Technic/tekkit/resources/logo.png', with 3 trie(s) remaining

[12:27:10] [sEVERE]Starting download of '', with 3 trie(s) remaining

[12:27:10] [sEVERE]Starting download of '', with 3 trie(s) remaining

[12:27:10] [sEVERE]Copying: \temp\file3130335582989050759.tmp to: \launcher\vanilla\resources\icon.png

[12:27:10] [sEVERE]File Downloaded: \launcher\vanilla\resources\icon.png

[12:27:10] [sEVERE]Copying: \temp\file3193446890189155858.tmp to: \launcher\tekkit\resources\favicon.png

[12:27:10] [sEVERE]Copying: \temp\file6949411853256271176.tmp to: \launcher\voxelmodpack\resources\logo.png

[12:27:10] [sEVERE]File Downloaded: \launcher\tekkit\resources\favicon.png

[12:27:10] [sEVERE]File Downloaded: \launcher\voxelmodpack\resources\logo.png

[12:27:10] [sEVERE]Copying: \temp\file8471654825154103289.tmp to: \launcher\voxelmodpack\resources\icon.png

[12:27:10] [sEVERE]File Downloaded: \launcher\voxelmodpack\resources\icon.png

[12:27:10] [sEVERE]Copying: \temp\file5746831662430146048.tmp to: \launcher\hackslashmine\resources\logo.png

[12:27:10] [sEVERE]File Downloaded: \launcher\hackslashmine\resources\logo.png

[12:27:10] [sEVERE]Copying: \temp\file2432420953947837847.tmp to: \launcher\yogbox\resources\favicon.png

[12:27:10] [sEVERE]File Downloaded: \launcher\yogbox\resources\favicon.png

[12:27:10] [sEVERE]Copying: \temp\file1747236884794784622.tmp to: \launcher\tekkit\resources\icon.png

[12:27:10] [sEVERE]Copying: \temp\file6203047929380375765.tmp to: \launcher\technicssp\resources\favicon.png

[12:27:10] [sEVERE]File Downloaded: \launcher\tekkit\resources\icon.png

[12:27:10] [sEVERE]Copying: \temp\file5703059874029338553.tmp to: \launcher\yogbox\resources\icon.png

[12:27:10] [sEVERE]Copying: \temp\file762866561948161453.tmp to: \launcher\voxelmodpack\resources\favicon.png

[12:27:10] [sEVERE]Copying: \temp\file4579720509750170867.tmp to: \launcher\hackslashmine\resources\favicon.png

[12:27:10] [sEVERE]File Downloaded: \launcher\voxelmodpack\resources\favicon.png

[12:27:10] [sEVERE]File Downloaded: \launcher\technicssp\resources\favicon.png

[12:27:10] [sEVERE]File Downloaded: \launcher\yogbox\resources\icon.png

[12:27:10] [sEVERE]File Downloaded: \launcher\hackslashmine\resources\favicon.png

[12:27:10] [sEVERE]Copying: \temp\file7023770761150575647.tmp to: \launcher\technicssp\resources\logo.png

[12:27:10] [sEVERE]Copying: \temp\file7705834477108916539.tmp to: \launcher\vanilla\resources\logo.png

[12:27:10] [sEVERE]Copying: \temp\file2088757954527890826.tmp to: \launcher\tekkit\resources\logo.png

[12:27:10] [sEVERE]File Downloaded: \launcher\vanilla\resources\logo.png

[12:27:10] [sEVERE]Copying: \temp\file5752159132276683921.tmp to: \launcher\hackslashmine\resources\icon.png

[12:27:10] [sEVERE]Copying: \temp\file1418602333250675986.tmp to: \launcher\technicssp\resources\icon.png

[12:27:10] [sEVERE]File Downloaded: \launcher\tekkit\resources\logo.png

[12:27:10] [sEVERE]Copying: \temp\file3278304788566751394.tmp to: \launcher\vanilla\resources\favicon.png

[12:27:10] [sEVERE]Copying: \temp\file4315399457377955233.tmp to: \launcher\yogbox\resources\logo.png

[12:27:10] [sEVERE]File Downloaded: \launcher\hackslashmine\resources\icon.png

[12:27:10] [sEVERE]File Downloaded: \launcher\yogbox\resources\logo.png

[12:27:10] [sEVERE]File Downloaded: \launcher\technicssp\resources\icon.png

[12:27:10] [sEVERE]File Downloaded: \launcher\vanilla\resources\favicon.png

[12:27:10] [sEVERE]File Downloaded: \launcher\technicssp\resources\logo.png

[12:27:10] [sEVERE][info] Downloading 'libraries.yml' from 'http://206.217.207.1/Technic/libraries.yml'.

[12:27:10] [sEVERE][info] Downloading 'modlibrary.yml' from 'http://mirror.technicpack.net/Technic/modlibrary.yml'.

[12:27:15] [sEVERE][info] Downloading 'modpack.yml' from 'http://mirror.technicpack.net/Technic/tekkit/modpack.yml'.

[12:27:15] [sEVERE][info] Downloading 'minecraft.yml' from 'http://mirror.technicpack.net/Technic/minecraft.yml'.

[12:27:34] [sEVERE]Starting download of minecraft, with 3 trie(s) remaining

[12:27:37] [sEVERE]Downloaded 'minecraft.jar' does not matche MD5 of any known minecraft version!

[12:27:37] [sEVERE]Starting download of minecraft, with 2 trie(s) remaining

[12:27:39] [sEVERE]Downloaded 'minecraft.jar' does not matche MD5 of any known minecraft version!

[12:27:39] [sEVERE]Starting download of minecraft, with 1 trie(s) remaining

[12:27:42] [sEVERE]Downloaded 'minecraft.jar' does not matche MD5 of any known minecraft version!

[12:27:42] [sEVERE]java.io.IOException: Failed to download minecraft

[12:27:42] [sEVERE]at org.spoutcraft.launcher.MinecraftDownloadUtils.downloadMinecraft(MinecraftDownloadUtils.java:77)

[12:27:42] [sEVERE]at org.spoutcraft.launcher.GameUpdater.updateMC(GameUpdater.java:129)

[12:27:42] [sEVERE]at org.spoutcraft.launcher.gui.LoginForm$3.doInBackground(LoginForm.java:850)

[12:27:42] [sEVERE]at org.spoutcraft.launcher.gui.LoginForm$3.doInBackground(LoginForm.java:832)

[12:27:42] [sEVERE]at javax.swing.SwingWorker$1.call(Unknown Source)

[12:27:42] [sEVERE]at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)

[12:27:42] [sEVERE]at java.util.concurrent.FutureTask.run(Unknown Source)

[12:27:42] [sEVERE]at javax.swing.SwingWorker.run(Unknown Source)

[12:27:42] [sEVERE]at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)

[12:27:42] [sEVERE]at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)

[12:27:42] [sEVERE]at java.lang.Thread.run(Unknown Source)