Next and Previous Buttons don't work!

I am using a Sansa Clip+ and suddently the Next Track and Previous Track buttons stopped working, BUT those buttons still work as fast-forwarding and rewinding within the same track (and if you FF to the end of the track, it automatically goes to the next). Is this a software issue or a hardware issue because I would think that since its the same button for Next/FF and Previous/RW that button either works or not. Is there anything I can do about this?

just contact the offical support:stuck_out_tongue: