Similar to the problem another user posted with use with Logic, my Tranzport is suddenly showing a blank screen when used with DP 5.13. Brand new batteries, link light showing on both controller and receiver, but nothing comes up on the Tranzport's screen when I press buttons ( with the exception of the battery check). Tranzport controls iTunes flawlessly (when switching from Native to iTunes controller mode) and display shows the appropriate characters when doing so.

Nothing has changed software, system or cable wise. I have reinstalled the mac driver, restarted, changed batteries.  Tranzport is in Native mode. All the necessary plug-ins are in the MOTU control surface folder. Still nothing on the screen, and Tranzport's transport buttons don't control DP. Please help.