I keep on having this message.
2012-11-12 19:29:23 [iNFO] [ForgeModLoader] Forge Mod Loader version 4.2.2.417 for Minecraft client:1.4.2, server:1.4.2 loading
2012-11-12 19:29:23 [FINEST] [ForgeModLoader] All core mods are successfully located
2012-11-12 19:29:23 [FINEST] [ForgeModLoader] Discovering coremods
2012-11-12 19:29:23 [iNFO] [sTDOUT] Downloading file: files.minecraftforge.net/fmllibs/argo-2.25.jar
2012-11-12 19:29:23 [iNFO] [sTDOUT] The libFile's path is C:\Users\Tengis\AppData\Roaming\.minecraft\lib\argo-2.25.jar
2012-11-12 19:29:23 [FINEST] [ForgeModLoader] Downloading file http://files.minecraftforge.net/fmllibs/argo-2.25.jar
2012-11-12 19:29:23 [iNFO] [ForgeModLoader] Downloading file http://files.minecraftforge.net/fmllibs/argo-2.25.jar
2012-11-12 19:29:53 [FINEST] [ForgeModLoader] Download complete
2012-11-12 19:29:53 [iNFO] [ForgeModLoader] Download complete
2012-11-12 19:29:53 [FINEST] [ForgeModLoader] Library file argo-2.25.jar was downloaded and verified successfully
2012-11-12 19:29:53 [iNFO] [sTDOUT] Downloading file: files.minecraftforge.net/fmllibs/guava-12.0.1.jar
2012-11-12 19:29:53 [iNFO] [sTDOUT] The libFile's path is C:\Users\Tengis\AppData\Roaming\.minecraft\lib\guava-12.0.1.jar
2012-11-12 19:29:53 [FINEST] [ForgeModLoader] Downloading file http://files.minecraftforge.net/fmllibs/guava-12.0.1.jar
2012-11-12 19:29:53 [iNFO] [ForgeModLoader] Downloading file http://files.minecraftforge.net/fmllibs/guava-12.0.1.jar
2012-11-12 19:30:19 [FINEST] [ForgeModLoader] Download complete
2012-11-12 19:30:19 [iNFO] [ForgeModLoader] Download complete
2012-11-12 19:30:19 [FINEST] [ForgeModLoader] Library file guava-12.0.1.jar was downloaded and verified successfully
2012-11-12 19:30:19 [iNFO] [sTDOUT] Downloading file: files.minecraftforge.net/fmllibs/asm-all-4.0.jar
2012-11-12 19:30:19 [iNFO] [sTDOUT] The libFile's path is C:\Users\Tengis\AppData\Roaming\.minecraft\lib\asm-all-4.0.jar
2012-11-12 19:30:19 [FINEST] [ForgeModLoader] Downloading file http://files.minecraftforge.net/fmllibs/asm-all-4.0.jar
2012-11-12 19:30:19 [iNFO] [ForgeModLoader] Downloading file http://files.minecraftforge.net/fmllibs/asm-all-4.0.jar
2012-11-12 19:30:51 [FINEST] [ForgeModLoader] Download complete
2012-11-12 19:30:51 [iNFO] [ForgeModLoader] Download complete
2012-11-12 19:30:51 [FINEST] [ForgeModLoader] Library file asm-all-4.0.jar was downloaded and verified successfully
2012-11-12 19:30:57 [iNFO] [sTDERR] Exception in thread "Thread-2" java.lang.RuntimeException: java.lang.NoClassDefFoundError: com/google/common/collect/Multimap
2012-11-12 19:30:57 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.FMLRelauncher.setupHome(FMLRelauncher.java:175)
2012-11-12 19:30:57 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.FMLRelauncher.relaunchApplet(FMLRelauncher.java:242)
2012-11-12 19:30:57 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.FMLRelauncher.appletEntry(FMLRelauncher.java:212)
2012-11-12 19:30:57 [iNFO] [sTDERR] at net.minecraft.client.MinecraftApplet.init(MinecraftApplet.java:28)
2012-11-12 19:30:57 [iNFO] [sTDERR] at net.minecraft.Launcher.replace(Launcher.java:153)
2012-11-12 19:30:57 [iNFO] [sTDERR] at net.minecraft.Launcher$1.run(Launcher.java:94)
2012-11-12 19:30:57 [iNFO] [sTDERR] Caused by: java.lang.NoClassDefFoundError: com/google/common/collect/Multimap
2012-11-12 19:30:57 [iNFO] [sTDERR] at java.lang.Class.getDeclaredConstructors0(Native Method)
2012-11-12 19:30:57 [iNFO] [sTDERR] at java.lang.Class.privateGetDeclaredConstructors(Unknown Source)
2012-11-12 19:30:57 [iNFO] [sTDERR] at java.lang.Class.getConstructor0(Unknown Source)
2012-11-12 19:30:57 [iNFO] [sTDERR] at java.lang.Class.newInstance0(Unknown Source)
2012-11-12 19:30:57 [iNFO] [sTDERR] at java.lang.Class.newInstance(Unknown Source)
2012-11-12 19:30:57 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.RelaunchClassLoader.registerTransformer(RelaunchClassLoader.java:62)
2012-11-12 19:30:57 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.RelaunchLibraryManager.handleLaunch(RelaunchLibraryManager.java:237)
2012-11-12 19:30:57 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.FMLRelauncher.setupHome(FMLRelauncher.java:155)
2012-11-12 19:30:57 [iNFO] [sTDERR] ... 5 more
2012-11-12 19:30:57 [iNFO] [sTDERR] Caused by: java.lang.ClassNotFoundException: com.google.common.collect.Multimap
2012-11-12 19:30:57 [iNFO] [sTDERR] at java.net.URLClassLoader$1.run(Unknown Source)
2012-11-12 19:30:57 [iNFO] [sTDERR] at java.net.URLClassLoader$1.run(Unknown Source)
2012-11-12 19:30:57 [iNFO] [sTDERR] at java.security.AccessController.doPrivileged(Native Method)
2012-11-12 19:30:57 [iNFO] [sTDERR] at java.net.URLClassLoader.findClass(Unknown Source)
2012-11-12 19:30:57 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:101)
2012-11-12 19:30:57 [iNFO] [sTDERR] at java.lang.ClassLoader.loadClass(Unknown Source)
2012-11-12 19:30:57 [iNFO] [sTDERR] at java.lang.ClassLoader.loadClass(Unknown Source)
2012-11-12 19:30:57 [iNFO] [sTDERR] ... 13 more
