Got a cdrw/dvd burner,  reads dvds, but not cds of any type,  put new one in but same thing. in a dell E310 tower, has roxio for burning program, shows up in my computer, set as a master or slave or cs but no differnce same thing will not read or reconizence a cd.  Tried windows burning program and roxio program to burn something, no luck.  Put a dvd in no problem ,  got me stumpped, any ideas.