Got a question about synching a Treo 750 with an Exchange Server. Does it need to be plugged into the computer where Outlook is installed or can a wireless sync be done?

I'm trying to get my Treo 750 to sync to my work server but I'm just getting an "error synching" message that shows up at the bottom of the status screen on Outlook mobile.

I have the certificates installed and tried the various outlook servers.

Thanks for any advise or hints.