I've been to so many forums, and none of what the few suggested seemed to work.
I'm going to say it simple, I hope you guys can help me out.
After reinstalling Windows XP along with all the drivers with my recovery CDs, my Pioneer DVD-RW DVR-K15 Drive isn't acting the same as it used to on my laptop. Here's how it is:

Plays and recognizes CDs
Burns CDs
Most of the times Plays and Recognizes DVD Movies
Does not recognize blank DVD-Rs
Does not recognize blank DVD-RWs
Will not burn DVDs (The main problem)

Also, it should be known that I have tried to use third-party programs, such as ImgBurn, Nero, and I even bought Alcohol 120% to test it. While they all say that the ISO or files are burned and the burning process was a "Success," when I put the DVD back in and look at it in Windows Explorer, it says it's blank with 0kb Free Space, and 0kb Used Space. Even when I bring the DVD to other computers, it says it's blank.

This is a massive bummer to me, because I used to use DVDs all the time to back up my music, movies, and files because CDs don't cut it.
I'm not a tech-genius, so kinda be detailed with me please?

Thanks.