previous and next button doesnt function

 In audiobooks, pressing once on >>| doesnt move to the next record.

Pressing continuasly does forward . same with |<<

The bottons do function, mechanically because I can use them in the menu

Do you have Chapter Mode on?

Nothing else could have caused this.I think you have Chapter mode on. Have you tried getting this out of it already? 

@mikkirourke wrote:

Nothing else could have caused this.I think you have Chapter mode on. Have you tried getting this out of it already? 

No, he needs to turn Chapter Mode ON in order to use the FF & REV buttons to slip to the next (or previous) track. If it in not on, the buttons will only advance or go back within the same file by holding the butons down. Pressing them momentarily does nothing.