I have 3 sites running iPrint but 1 site is creating problems

I am running 6.5 sp6 with the latest NDPSGW (f??)

Because of the problems, I have all the users printing via NDPS (4.91

This weeekend, I removed and re-install all of NDPS / iPrint.

The printers deploy out to the users but they cannot print to them -
the error is : Failed to Open, retrying.

Also, my NDPS printers are being removed from the PCs - How can I stop
this ? I need both NDPS and iPrint running until iPrint is working.