PLEASE HELP! ActiveSync won't stay open

[Guest texaspeaks]

I'm at my wit's end here. I got my new 2125 last week, installed Activesync, and it ran fine for several days. I've configured my firewall to allow it to run, and I had no problems until Sunday. Out of the blue, Activesync wouldn't even show up in the system tray. Whenever I try to start it, I see it pop up in the task manager for about 5 seconds, and then it disappears. I've uninstalled and reinstalled. I've updated to 4.1 and even the 4.2 beta. I've done system restores to various points within the last two weeks. I've shut down my antivirus, antispyware, and firewall. All to no avail. Everytime I try to start it, it shuts itself down, no matter what I do.

Any ideas?