QTR-Quadtone RIP

Hello,

My Stuff : R800 Epson with QTR release 2.4.2 on Mac OS X 10.4.6 and 10.4.7


I use a very thick paper , In order to be sure to load the paper
I preload it, pushing paper sheet feed R800 button

Then I choose the Sheet Feed in the QTR printer dialog
I click print

The printer start working, the head moves normaly 3..4 times then stops 
The printer grab the paper back (1 inch) and stard again to print the same pattern 3..4 times
then the paper feed button led start flashing (red) and printing process stops

The Epson utility says "communication error"

I Tried the same steps on the R800 with standard EPSON driver 
Everything work fine

I Tried the same steps (paper preload) with QTR driver on Epson R220
the printing process work fine too.

Anyone experienced this bug ?

Regards

Emmanuel BRUNET
GigaPlanet SARL PARIS