Shadowbeast007

I'm working in the Fossil/Archeology Mod Dev Team. We currently try to update the mod from 1.4.7 to 1.5.1. In Eclipse, the 1.5.1 version is running without problems, in MC I get the following bug: java.lang.NoClassDefFoundError: fossil/entity/mob/EntityVelociraptor at this Line(1253) in the Fossil class: EntityRegistry.registerModEntity(EntityVelociraptor.class, "Velociraptor", 9, this, 250, 5, true); Here is the Source Code: https://github.com/Shadowbeast/FossilArcheologyTest/tree/master/fossil I tried this for a while now and can't get any progress, maybe someone can help me with that? Would be much appreciated.