Does not work. The topic starter has same problem as me..
MC 1.2.5
Modloader and ModloaderMP is running compitable with it.So is IC2 v1.9.
It seems mcForge s the problem. Using Magic Launcher here and it says it gives errors on the Forge. The above link does not help getting the forge compatible with 1.2.5
Any advise? 
Thanks!