DVD and CD-RW Drive not recognizing burnt CD's.

So I only have a CD burner and decided to back up some video's and stuff that I have. Most are large, about 690+ MB or so. I zipped a few to make them smaller, and used Roxio Easy CD Creator(Only thing I had), and chose the Data CD option to make it. When I put it in my CD-RW Drive, it comes up blank, and my DVD drive won't read it(Format error). So that frustrates me, but I keep going.

I have a few movies that I don't need to Zip to have them fit on a 700 MB CD. I burn those and only 2 out of the 5 I burnt are being recognized. I can open them just fine and the .avi file is right there. The other one's, which are also .avi files, are having the same error as the zipped ones. Anyone know why?

Errr, and now it is doing the same to the Data CD's I burnt that have my mp3's on them.


Tried on a different comp in a DVD drive and it said "Please insert disk into drive D:"

Oh yeah I have a Dell Dimension 4550 Series circa 2003 but it doesnt say what the drives are.

 

Found out what the drives are:
Liteon DVD-Rom LTD163
Samsung Cd-r/Rw SW-248F

Updated Firmware, and updated some UDF thing from Roxio. Still to no avail.