How do I set Windows to see my Touch Pro

[upparoom]

I took a picture on my phone, then when I plugged it into my Windows XP box, it asked if I wanted to use Activesync or treat it as an external drive.

Now I dont know how to set it back to Activesync.

When I plug the phone in USB, it just pops up a drive letter and Activesync doesnt see it at all.