Did you read this:SEVERE] [ForgeModLoader] This version of FML is built for Minecraft 1.4.7, we have detected Minecraft 1.4.6 in your minecraft jar file
2013-01-05 14:54:46 [sTDOUT] A CRITICAL PROBLEM OCCURED INITIALIZING MINECRAFT - LIKELY YOU HAVE AN INCORRECT VERSION FOR THIS FML? download the minecraft 1.4.7 pre-release from http://www.mojang.com/2012/12/minecraft-1-4-7-pre-release/ or downgrade forge.
And did you paid for MC? This could be the problem.
I had the same problem and now i use the magic launcher.