I also got that. Then I tried something else and I ended up getting this.
C:\Techit>"C:\Program Files (x86)\Java\jre7\bin\java" -Xmx512M -Xms512M -jar Tek
kit.jar nogui
182 recipes
27 achievements
15:18:16 [iNFO] Starting minecraft server version 1.2.5
15:18:16 [iNFO] Attempting early MinecraftForge initialization
15:18:16 [iNFO] Completed early MinecraftForge initialization
15:18:16 [iNFO] Forge Mod Loader version 2.2.91.182 for Minecraft 1.2.5 loading
15:18:16 [iNFO] Loading mods from C:\Techit\mods
15:18:16 [sEVERE] Zip file BalkonsWeaponMod1.2.5.jar failed to read properly
15:18:16 [iNFO] File BalkonsWeaponMod1.2.5.jar contained no mods
15:18:16 [iNFO] Directory weaponmod contained no mods
15:18:16 [sEVERE] A problem has occured during mod loading. Likely a corrupt jar
is located in your mods directory
15:18:16 [sEVERE] cpw.mods.fml.common.LoaderException: java.util.zip.ZipExceptio
n: error in opening zip file
15:18:16 [sEVERE] at cpw.mods.fml.common.Loader.load(Loader.java:436)
15:18:16 [sEVERE] at cpw.mods.fml.common.Loader.loadMods(Loader.java:606)
15:18:16 [sEVERE] at cpw.mods.fml.server.FMLBukkitHandler.onPreLoad(FMLBuk
kitHandler.java:134)
15:18:16 [sEVERE] at net.minecraft.server.MinecraftServer.init(MinecraftSe
rver.java:125)
15:18:16 [sEVERE] at net.minecraft.server.MinecraftServer.run(MinecraftSer
ver.java:428)
15:18:16 [sEVERE] at net.minecraft.server.ThreadServerApplication.run(Sour
ceFile:492)
15:18:16 [sEVERE] Caused by: java.util.zip.ZipException: error in opening zip fi
le
15:18:16 [sEVERE] at java.util.zip.ZipFile.open(Native Method)
15:18:16 [sEVERE] at java.util.zip.ZipFile.<init>(Unknown Source)
15:18:16 [sEVERE] at java.util.zip.ZipFile.<init>(Unknown Source)
15:18:16 [sEVERE] at java.util.zip.ZipFile.<init>(Unknown Source)
15:18:16 [sEVERE] at cpw.mods.fml.common.Loader.attemptFileLoad(Loader.jav
a:551)
15:18:16 [sEVERE] at cpw.mods.fml.common.Loader.load(Loader.java:419)
15:18:16 [sEVERE] ... 5 more
15:18:16 [sEVERE] Unexpected exception
cpw.mods.fml.common.LoaderException: java.util.zip.ZipException: error in openin
g zip file
at cpw.mods.fml.common.Loader.load(Loader.java:436)
at cpw.mods.fml.common.Loader.loadMods(Loader.java:606)
at cpw.mods.fml.server.FMLBukkitHandler.onPreLoad(FMLBukkitHandler.java:
134)
at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:125)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:428)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)
Caused by: java.util.zip.ZipException: error in opening zip file
at java.util.zip.ZipFile.open(Native Method)
at java.util.zip.ZipFile.<init>(Unknown Source)
at java.util.zip.ZipFile.<init>(Unknown Source)
at java.util.zip.ZipFile.<init>(Unknown Source)
at cpw.mods.fml.common.Loader.attemptFileLoad(Loader.java:551)
at cpw.mods.fml.common.Loader.load(Loader.java:419)
... 5 more
>
Please help fix! :(