Funambol works, but not with egroupware

hello,

I try to synchronize egroupware with a blackberry pearl 8100 using funambol 3.0.8, but always i have an error: Synchronization failed. Invalid message from server.

If i synchronize with my.funambol , the aplication works ok. But with egroupware not!.

If i active the debug of egroupware my funambol says:

"Synchronization failed. Parsing XML error, TAG SyncML - : String index out of range: -61

any idea?