My DVDROM reads CD's but no DVD's at all

Hey guys, I need some help.
I just installed in my PC a DVD ROM : DYNEX Model DX-DVDR100
My computer recognizes the driver, but if I put a DVD it won't read it. The response I get is "Insert a disk in the unit". I tried several DVDs and same problem with all. However, the driver will read music CDs.
I think I need the drivers first, but the Manufacturer doesnt have any posted in the webpage. I am using WIN XP.
I think the first step should be the drivers, if some1 can help me find them, that would be great!!
Regards..

Welcome to Windrivers elvisduarte

Windows xp cannot natively play dvds

Have you got any software that came with the drive?

try this free DVD player