I need help.I have a Sony vx2100 and I can't get my computer to recognize it as a device.
Any suggestions would be greatly appreciated.

First, try it on another computer. If it works on the other computer, it's your computer issue. If it doesn't, it's possibly a camera issue... blown firewire port?

What NLE are you using? You may need to change the settings.

Try the hints and tips in a document I wrote linked to via this post:

http://www.dvinfo.net/conf/open-dv-discussion/117082-troubleshooting-dv-camcorder-connectivity.html#post843156