i dont know what else to do, i try to install it 5 times 
Ver Imagen: http://s3.subirimagenes.com:81/imagen/previo/thump_7718645minecraft-error.png</a>
Display Spoiler
Code
Mods loaded: 3ModLoader 1.2.5mod_MinecraftForge 3.1.3.107mod_IC2 v1.95
Minecraft has crashed! ----------------------
Minecraft has stopped running because it encountered a problem.
--- BEGIN ERROR REPORT c3c35a90 --------Generated 23/05/12 17:51
Minecraft: Minecraft 1.2.5OS: Windows 7 (x86) version 6.1Java: 1.6.0_26, Sun Microsystems Inc.VM: Java HotSpot(TM) Client VM (mixed mode), Sun Microsystems Inc.LWJGL: 2.4.2OpenGL: AMD Radeon HD 6670 version 4.2.11631 Compatibility Profile Context, ATI Technologies Inc.
java.util.FormatFlagsConversionMismatchException: Conversion = s, Flags = at java.util.Formatter$FormatSpecifier.failMismatch(Unknown Source) at java.util.Formatter$FormatSpecifier.checkBadFlags(Unknown Source) at java.util.Formatter$FormatSpecifier.checkGeneral(Unknown Source) at java.util.Formatter$FormatSpecifier.<init>(Unknown Source) at java.util.Formatter.parse(Unknown Source) at java.util.Formatter.format(Unknown Source) at java.util.Formatter.format(Unknown Source) at java.lang.String.format(Unknown Source) at adn.a(SourceFile:142) at cy.a(SourceFile:12) at ModLoader.initStats(ModLoader.java:933) at ModLoader.init(ModLoader.java:910) at ModLoader.addAllRenderers(ModLoader.java:189) at ahu.<init>(RenderManager.java:86) at ahu.<clinit>(RenderManager.java:14) at net.minecraft.client.Minecraft.a(Minecraft.java:394) at net.minecraft.client.Minecraft.run(Minecraft.java:732) at java.lang.Thread.run(Unknown Source)--- END ERROR REPORT 18ff32dd ----------