Can't view all music on disk

When I Select Card from the Main Menu I am not able to view all of my music. I know it is there because when I select Folders > External Card, it is all there. Also, when I plug it into my PC, I can see all my ,usic. SO why is it that I cannot see all my music when I select card from the main menu?

File and folder names can contain invalid characters - such as # $% & @ … usw.

Most likely you have exceeded the database limitation of 2000 songs on the card. You can still see & play them if going through the Folders option, but it can’t see, read or display any above the limit when using the regular database menu.