Hi. I have the Digital Research Technologies DVD Dual Format 4x Rewritable Drive. First it would not burn DVD+R. Now, i burned a cd-r and i came back to find it spinning at great speed and making a large sound. The disc was extremely hot. Now it will not read or write any kind of disc. Please Help me!

I run windows XP on an etower and have 40 GB hard drive.
I have burned DVD-r and Cd-r before and it worked just fine.
Their tech support will not reply to my request for help