"Internal exception: java.lang.NullPointerException" When I join a specific server?

[Mrmikeman2]

Title: "Internal exception: java.lang.NullPointerException" When I join a specific server?

Version: 3.1.2

OS: Windows Microsoft XP (Service Pack 3)

Java Version: jre 7

Description of Problem:

The other day, while playing on my server, (which is not hosted in my home, etc. Hosted by a professional hosting company) I spawned an item (don't remember what it was), and randomely got an error saying: "Internal exception: java.lang.NullPointerException". Now I get this error every time I try to join my server. I have gone into the panel, and cleared my inventory/wiped my history of ever being on the server. I also re-installed/updated java, deleted my .techniclauncher folder, went on alts, and tried freshening my bin. None of that worked.

I currently use the "Tekkit.jar" to launch, because the launcher.exe won't work with my computer.

If any other information is needed, just comment, I'm pretty bored not being able to access my server, so I'll be checking up on this often. Thanks.

Error Messages:

Internal exception: java.lang.NullPointerException

Error Log:

[22:54:02] [sEVERE]	java.lang.NullPointerException

[22:54:02] [sEVERE]		at acp.q(SourceFile:86)

[22:54:02] [sEVERE]		at acp.c(SourceFile:72)

[22:54:02] [sEVERE]		at vp.a(SourceFile:97)

[22:54:03] [sEVERE]		at net.minecraft.client.Minecraft.a(Minecraft.java:641)

[22:54:03] [sEVERE]		at xt.a(GuiMainMenu.java:163)

[22:54:03] [sEVERE]		at vp.a(SourceFile:74)

[22:54:03] [sEVERE]		at vp.f(SourceFile:122)

[22:54:03] [sEVERE]		at vp.i(SourceFile:110)

[22:54:03] [sEVERE]		at net.minecraft.client.Minecraft.k(Minecraft.java:1571)

[22:54:03] [sEVERE]		at net.minecraft.client.Minecraft.x(Minecraft.java:825)

[22:54:03] [sEVERE]		at net.minecraft.client.Minecraft.run(Minecraft.java:753)

[22:54:03] [sEVERE]		at java.lang.Thread.run(Unknown Source)

[22:54:04] [sEVERE]	(MAtmos : INFO) Expansion earthlies_database.xrl loaded.



[22:54:04] [sEVERE]	(MAtmos : INFO) ExpansionLoader Loading and Limbo are now empty.



[22:54:04] [sEVERE]	(MAtmos : INFO) Ready.



[22:54:15] [sEVERE]	java.lang.NullPointerException

[22:54:15] [sEVERE]		at abs.b(SourceFile:227)

[22:54:15] [sEVERE]		at abl.a(SourceFile:29)

[22:54:15] [sEVERE]		at abs.a(SourceFile:155)

[22:54:15] [sEVERE]		at lg.e(NetworkManager.java:227)

[22:54:15] [sEVERE]		at lg.c(NetworkManager.java:389)

[22:54:15] [sEVERE]		at rl.run(SourceFile:76)

[Mrmikeman2]

If someone could please answer this that'd be great. I still can't get on my server.