sansa e200

my sandisc tells me when turned on ‘refresh database fail’ can you tell me why this is.  Also when attempting to convert music files onto the disc via windows media player it confirms music has been sent on the computer but nothing shows up on the sandisc!!??  Lastly I cannot get the computer to recognise the hardware in MTP mode, only MSC mode!?  Can anyone help

Its SanDisk…

But which OS are you running, as well as which version of Windows Media Player do you have? Also, for good measure, where did you get your music from?