k_w53

I just bought a Sony MZ-R37 MD recorder to record band rehearsals and play along with them for practice. I was trying it out with a minidisc that had some material on it, and after trying to record, I couldn't play anything on the disc. The unit does record, but now I'm afraid to use it with previous material on the disc. i also would like to recover what I had on that minidisc. Any suggestions? Thank you for your response. Kevin