C150 - TOO MANY MUSICS FAILED

I have a C150 - 2Gb and I use the Rhapsody to converter my MP3 files, but almost of them failed. What is going on ?
Can I have another converter ?
Or I am doing something wrong, because I used to converter the files without any problem.
Please help me.

Thank you !!!

why are you converting your mp3 files? Are you using the rhapsody service or the files your personal files? can you just drag and drop you mp3s?