ActiveSync not working

[SuBDivisions]

Go into control panel, device manager, and see if you have anything not functionaing correctly (Yellow Exclamation mark)...

Is that USB Port working? Try another port.. If you had it in there and it failed to install at some point, it may be waiting for drivers that did not get installed if you plugged it in before you have WMC installed.

If so you can uninstall it (or remove it) by going in device manager and on the toolbar hitting SHOW HIDDEN DEVICES.. See if an unknown device is listed, and delete/uninstall it.. Plug your phone back in after and see if it works.