Motorola E815 / E816 Hollywood

I'm having a small problem, and I hope somebody can give me some help. I recently purchased a Motorola Mobile Phone Tools kit via eBay, did a seem edit to my phone, and have been using the Mobile Phone Tools software to transfer ringtones and wallpapers to my phone and transflash card. Its been working for the past 2 days perfectly, but today, I plugged in my phone, and Windows doesn't recognize my phone at all. I tried pointing Windows to the drivers on my hard drive, but that didn't work either. If Windows doesn't recognize the drivers, MPT doesn't work. Does anyone have any bright ideas to try besides reformatting my hard drive and reinstalling XP? Thanks