Computer doesn't recognize in MTP mode

Hey guys,

I dont know why but my new computer doesn’t recognize my Sansa Clip+ in MTP

Neither with Frimware

It only recognize if I switch to MSC. between it suggest me to format it,

I tried to format with windows but it says " Windows was unable to format" 

And tried to format from the device… but it still suggestme to format it… 

The problem started 1 week ago, when I got my new computer… 

By they way, in my older computer the MTP worked as well

Thanks in advance !

Sorry for my typo :<