slotRadio on Sansa Fuze+!

I’m having trouble with the slot radio card on my sansa fuze+.  When I click on the picture of the slot radio card, the channels do not come up but instead a screen that says slot radio pops up temporarily, then back to the picture of the card.  It only recently started doing this and every once in a while, it actually works but most times, it doesn’t.  Does anyone know what I can try?  I have already downloaded the most recent update for the fuze+  Thanks, Mike