bbc_radio

I capture audio to wma using microsoft media encoder, but when I import it into my MZ-RH10 it gets converted and doesn't sound so good. I downloaded some mp3's from bbc.co.uk and they don't play at all on my player. Although I have downloaded mp3's from other sources and they play fine. I even saved my wma to wav and then used a wav to mp3 converter to try to get better sound/compression. The MZ-RH10 can play these via Sonic Stage (throught my PC's speakers) but when I detatch the player and want to listen to the same file, get the nasty "Cannot Play" message. Please advise. Thanks.