zed2005

Hi, I was recording something on Sonic Stage at the end of which i got an error message. It reads... cannot use this disc as an audio disc because it was initialized by other than Sonic stage.... Now the thing is I have on this disc nearly one GB of audio recordings, both via my pc and by analog recording. Whewn I try playing it: it says "NO TRACK". I'm using a MZ-NH600D What do I do?