BoP crashes the tekkit Server

Tekkit 1.2.9e
Minecraft 1.6.4
forge: 1.6.4-1.0.0.250
WorldCore 1.6.4-1.1.0.17
Server: LINUX

On the Clientside (Win7 64bit), it runs fine, but the same config on the server cause him crashing - he will not run.

any ideas for solution?

Hint: ID Conflicts are soluted with IdFix.jar, or handmade ID Changes, both works on the Clientside, not on serverside.

1.6 is no longer supported by us and thus, i'd prefer not to have 1.6 issues kept here. In addition, if the Tekkie server uses MCPC+, that has never been and never will be supported either.