erm hehe... my fault :X It was the cs_inhabitregistered module...
next time I'll exactly read the module description.^^
Now i unloaded it and the bots do join perfectly. Sry mates.
But another question: I used the cs_inhabitregistered module to force chanserv to join all registered channels, but I also want to have the possibility to assign a Services Bot. I already use the cs_join module to allow the channel owners to assign chanserv by hand, but is there a modified module of the cs_inhabitregistered module which let chanserv join every registered channel WITHOUT disabling botserv?
Sorry for my silliness... and the bad english