CD/DVD will not dump memory



I have a Maddog 16x MD 9a2 CD/DVD burner . When I put in a cd it plays just fine but when I remove it and put in another one the memory holds all the songs from the first one . It takes windows a long time to try and read it but still comes up wrong .
If I try and play the songs that are stuck in memory it freezes windows .

so basically I need to know how to force it to dump the songs from memory.

thank you very much for any help