Not possible to print from paper tray

Hi,

I have a problem with my Xerox Phaser 6500DN.

I have used this printer for some time now and never had any problems with it, but recently I can only print using the manual feed of the printer. There is plenty of paper in the paper tray but still it's only possible to print using the manual feed option.

I have set the correct settings in the printer driver (default to tray 1) but still I only can print using the manual feed, what can I do to fix this?

Thanks