Printing Text Files

Hi all I am deploying iprint mobile and I have stumbled onto a problem. Printers that I have setup as Airprint I can print a text file (with the .txt extension) to just fine, but those same printers fail when I try from the iprint app for IOS and android. The error in the audit log is "cancelled by user". From the documentation it appears the internal renderer is used for .txt files so Im guessing the problem lies there. I have tried different ppd files but it doesn't seem to make a difference. The printers I am testing with are all HP's one is a 4200 one is a 4014 and the third one is a CP2025.

Any ideas on what to try?