hi, i played on my private server with my brother and we started to start using ic machines. we placed generator 
and placed intro it 1 coal after that placed extractor 
but in incorrect place when i wrenched 
it and placed next to the generator and i go home and we got crash . crash repeats on every server startup.
mods list:
jar:
Minecraft Forge 6.5.0.471
coremods folder:
CodeChickenCore 0.7.0.0
NEI 1.4.4.0
mods folder:
buildcraft 3.3.0
ComputerCraft 1.48pr2
EnderStorage 1.3.1.0
Forestry 1.6.3.9
Industrial Craft² 1.112.170-lf
Iron Chests 4.5.1.199
RedPower 2 Pre 6
Steves Carts 2 A40
Thermal Expansion 2.1.6
crash report : http://pastebin.com/UcmfpUvB