Can't play cda with cd burner



win media plyer says something about invalid path, win cdplayer refuses to open any cda files (says: no cda format or cdrom in tray). on the other hand i can play cda using nero when turning to option “save tracks” from cd audio cdrom. my cdrom device plays cda with no problem.
another thing is i can’t open any file straight from my creative cdrw using start/run option. no problem while double-clicking.
any suggestions?