So i'm attempting to setup funambol 7.1.1, with the Zimbra Connector, so i can sync my blackberry to a zimbra server.

All appears to go well, except that when i attempt to sync, the funambol logs (on the funambol server) show an error:
java.io.IOException: Server returned HTTP response code: 500 for URL: https://my.zimbra.webmail.address/service/soap/

I cannot find any other reports of this problem, i've tried the forums on funambol's site, no use. Any other suggestions?