Hey guys!
tried to setup my own tekkit server for me and my friends, however, I ran into a little problem:
2012-03-29 19:38:41 [FINE] Failed to load mod from "mod_IC2AdvancedMachines.class"
2012-03-29 19:38:41 [FINER] THROW
java.lang.UnsupportedClassVersionError: net/minecraft/server/mod_IC2AdvancedMachines : Unsupported major.minor version 51.0
Looks like something is wrong with an IC2 plugin?
How can I fix this?