Napster to Go, album art

I using napster to go on my m6, but the album art is not displayed has anyone got it to work with napster to go ??
Napster creates a jpg with the same filename as the album and a .alb file too sometimes just the .alb file is there, both times no album art
I have tried copying the jpg to the \album directory still nothing

Any help would be great thanks

Simon