ActiveSync on SBS Exchange 2003 not working

Hi, i have SSL comodo certificate installed on my exchange 2003 server. So i have OWA and RPC over HTTP working fine. Also i tryed to connect to exchange with nokia e71 and MailforExchange application, without success. Also i tryed to test server over, and receive this kind of error:
Validating certificate trust for Windows Mobile Devices
Certificate trust validation failed

any help will be appreciated!

May we please have your ActiveSync URL and if you do not wish to share it here then please open a ticket via