Lexmark CS517
Try one or more of the following:
Note: If the printer detects a tray that has the correct paper type and size, then it feeds from that tray. If the printer cannot detect a tray that has the correct paper type and size, then it prints from the default paper source.
Here are steps to troubleshoot when a 'Tray 1 Empty, Load Tray 1 with Paper' error continually appears on a Lexmark CS310, CS410, CS510, CX310, CX410, or CX510.
Inconsistency with other supplies type identification when using Printer Agent