Hello, I'm trying to use my CD-RW's for my songs so that I can listen to them on other systems but when I try to record the songs to the already used CD-RW which was used for movies in the past it constantly tells to that it needs to be erased. I erase it and try to record again then asks again to erase. It is because I used it for movies and now I can only use it for movies? Please help. Thanks.