If you have installed mc forge 1.3.3.12, then the ".minecraft / modLoader.txt" line should be 'FINE: Mod Initialized: "mod_MinecraftForge 1.3.3.12" from mod_MinecraftForge.class'.
Reinstall all.
Link to download mc forge 1.3.3.12 http://goo.gl/C3kTH (direct)
or http://www.mod-buildcraft.com/forums/topic/forge-downloads/ (need to click on the Recommended Client)