[KoPPerHarD]

->|BoD|<-KashxD: Disconnect: Kicked by Console : Bitte rejoine!!.
Disconnect: Kicked by Console : Bitte rejoine!!.

This message nearly every Player who join my server get, could someone help how to fix?

[sinblaster]

nothing to do with CSSM. Tell steam. Sounds like a bad connection between server and player. This is a common problem that you will find dominating when searching with google.