QTR-Quadtone RIP

Hi folks,

I'm having difficulty with QTR and the manual single sheet rear feed
on my newly acquired R2400 (no problem with this on my 2200).  

I tried printing an image that is about 6" high x 8" wide (landscape
orientation) on Letter paper (which I have printed many times before)
on Velvet Fine Art in the manual single sheet rear feed.  I had
already printed this image using Photoshop CS thru the manual feed
with no problem (it's centered on the paper and the printer correctly
advanced the paper and positioned the image).  When I tried to print
it with QTR, the paper was not advanced to the correct left margin but
instead started printing on the far left edge of the paper.  In fact,
it began laying down ink before the paper was even lined up (ie. about
1/4 inch of the left side of the image was "printed" before the paper
came under the print head, I guess).

I was using a 2.3.x version of QTR at the time.  Thinking it might be
a bug that was fixed in later versions, I upgraded to the current QTR
version 2.4.3.10  -- but the problem persists.

Am I doing something wrong or is there some trick to getting this
sorted out that I'm not aware of?  Any help or advice is much
appreciated!!

Gary Benson
Eagle River, Alaska