There is currently a compatibility issue between Not Enough Items and Forge. When installed side by side Minecraft fails to load. This is not a problem with IndustrialCraft 2 and no one on the forums can help you resolve the problem.
The newest version of forge that is known to work with Not Enough Items is 22.214.171.124. Or if you do not want to downgrade forge, use Too Many Items.
Forge 126.96.36.199: http://lexmanos.no-ip.org:8080/job/Forge/105/
188.8.131.52 Has also been reported to work.