I am trying to install Aether II to play with my friends. I deleted my .minecraft and reinstalled using the older launcher. Then I backdated from 1.5.2 to 1.5.1 using MVC. I went in-game to make sure everything worked, and it did. The game said 1.5.1 in the corner and I could play without issues. When I installed forge however, it crashed and said something about a fatal error. Here is the log:
2013-07-09 19:05:30 [INFO] [ForgeModLoader] Forge Mod Loader version 5.1.43.679 for Minecraft 1.5.1 loading
2013-07-09 19:05:30 [INFO] [ForgeModLoader] Java is Java HotSpot™ 64-Bit Server VM, version 1.7.0_10, running on Windows 7:amd64:6.1, installed at C:\Program Files\Java\jre7
2013-07-09 19:05:30 [FINE] [ForgeModLoader] Java classpath at launch is /C:/Users/Name/Desktop/MagicLauncher_1.1.6.exe
2013-07-09 19:05:30 [FINE] [ForgeModLoader] Java library path at launch is bin/natives
2013-07-09 19:05:30 [FINE] [ForgeModLoader] Enabling runtime deobfuscation
2013-07-09 19:05:30 [FINEST] [ForgeModLoader] All core mods are successfully located
2013-07-09 19:05:30 [FINEST] [ForgeModLoader] Discovering coremods
2013-07-09 19:05:30 [FINEST] [ForgeModLoader] Found library file argo-small-3.2.jar present and correct in lib dir
2013-07-09 19:05:30 [FINEST] [ForgeModLoader] Found library file guava-14.0-rc3.jar present and correct in lib dir
2013-07-09 19:05:30 [FINEST] [ForgeModLoader] Found library file asm-all-4.1.jar present and correct in lib dir
2013-07-09 19:05:30 [FINEST] [ForgeModLoader] Found library file bcprov-jdk15on-148.jar present and correct in lib dir
2013-07-09 19:05:30 [FINEST] [ForgeModLoader] Found library file deobfuscation_data_1.5.1.zip present and correct in lib dir
2013-07-09 19:05:30 [FINEST] [ForgeModLoader] Found library file scala-library.jar present and correct in lib dir
2013-07-09 19:05:30 [FINEST] [ForgeModLoader] Running coremod plugins
2013-07-09 19:05:30 [FINEST] [ForgeModLoader] Running coremod plugin FMLCorePlugin
2013-07-09 19:05:31 [INFO] [ForgeModLoader] Found valid fingerprint for Minecraft Forge. Certificate fingerprint de4cf8a3f3bc15635810044c39240bf96804ea7d
2013-07-09 19:05:31 [FINEST] [ForgeModLoader] Coremod plugin FMLCorePlugin run successfully
2013-07-09 19:05:31 [FINEST] [ForgeModLoader] Running coremod plugin FMLForgePlugin
2013-07-09 19:05:31 [FINEST] [ForgeModLoader] Coremod plugin FMLForgePlugin run successfully
2013-07-09 19:05:31 [FINEST] [ForgeModLoader] Validating minecraft
2013-07-09 19:05:31 [SEVERE] [ForgeModLoader] This version of FML is built for Minecraft 1.5.1, we have detected Minecraft 1.5.2 in your minecraft jar file
2013-07-09 19:05:31 [INFO] [STDOUT] A CRITICAL PROBLEM OCCURED INITIALIZING MINECRAFT - LIKELY YOU HAVE AN INCORRECT VERSION FOR THIS FML
It says that even though I have the correct version...
2013-07-09 19:05:30 [INFO] [ForgeModLoader] Forge Mod Loader version 5.1.43.679 for Minecraft 1.5.1 loading
2013-07-09 19:05:30 [INFO] [ForgeModLoader] Java is Java HotSpot™ 64-Bit Server VM, version 1.7.0_10, running on Windows 7:amd64:6.1, installed at C:\Program Files\Java\jre7
2013-07-09 19:05:30 [FINE] [ForgeModLoader] Java classpath at launch is /C:/Users/Name/Desktop/MagicLauncher_1.1.6.exe
2013-07-09 19:05:30 [FINE] [ForgeModLoader] Java library path at launch is bin/natives
2013-07-09 19:05:30 [FINE] [ForgeModLoader] Enabling runtime deobfuscation
2013-07-09 19:05:30 [FINEST] [ForgeModLoader] All core mods are successfully located
2013-07-09 19:05:30 [FINEST] [ForgeModLoader] Discovering coremods
2013-07-09 19:05:30 [FINEST] [ForgeModLoader] Found library file argo-small-3.2.jar present and correct in lib dir
2013-07-09 19:05:30 [FINEST] [ForgeModLoader] Found library file guava-14.0-rc3.jar present and correct in lib dir
2013-07-09 19:05:30 [FINEST] [ForgeModLoader] Found library file asm-all-4.1.jar present and correct in lib dir
2013-07-09 19:05:30 [FINEST] [ForgeModLoader] Found library file bcprov-jdk15on-148.jar present and correct in lib dir
2013-07-09 19:05:30 [FINEST] [ForgeModLoader] Found library file deobfuscation_data_1.5.1.zip present and correct in lib dir
2013-07-09 19:05:30 [FINEST] [ForgeModLoader] Found library file scala-library.jar present and correct in lib dir
2013-07-09 19:05:30 [FINEST] [ForgeModLoader] Running coremod plugins
2013-07-09 19:05:30 [FINEST] [ForgeModLoader] Running coremod plugin FMLCorePlugin
2013-07-09 19:05:31 [INFO] [ForgeModLoader] Found valid fingerprint for Minecraft Forge. Certificate fingerprint de4cf8a3f3bc15635810044c39240bf96804ea7d
2013-07-09 19:05:31 [FINEST] [ForgeModLoader] Coremod plugin FMLCorePlugin run successfully
2013-07-09 19:05:31 [FINEST] [ForgeModLoader] Running coremod plugin FMLForgePlugin
2013-07-09 19:05:31 [FINEST] [ForgeModLoader] Coremod plugin FMLForgePlugin run successfully
2013-07-09 19:05:31 [FINEST] [ForgeModLoader] Validating minecraft
2013-07-09 19:05:31 [SEVERE] [ForgeModLoader] This version of FML is built for Minecraft 1.5.1, we have detected Minecraft 1.5.2 in your minecraft jar file
2013-07-09 19:05:31 [INFO] [STDOUT] A CRITICAL PROBLEM OCCURED INITIALIZING MINECRAFT - LIKELY YOU HAVE AN INCORRECT VERSION FOR THIS FML