SyncMLPro iPhone sync only one phonenumber per contact

[ITSYS]

The synchronisation with contacts work, put we couldn't sync more then one phonenumber per contact.
If you write more then one in Groupwise, the sync takes only the first one. If you write more then one in the iPhone Addressbook, the phone numbers is reduced of only one.

Groupwise-Server <-> IntellisyncMobile Server <-> iPhone

Thanks for help