Sansa CLip Zip will not receive music. Please Help

I am having a similar problem using my Clip Zip with Rhapsody. It worked fine for a long time but then when i tried to play a song my Clip Zip says “Synchronize to continue your music subscription”. I’ve done that multiple times on Rhapsody and it says I am synched for another month. The Clip Zip also says it is renewed through that date. However the error message continues to occur everytime I try to play something. Very frustrating since it happened all of a sudden a couple of weeks ago and has continued ever since. What are we paying for when we can’t listen to the Rhapsody music?