I would keep fiddling with those viewer setting and also ensure that you have plenty of free storage and program memory - this is all being buffered on the device after all. If you are conencted to a high res desktop, then you need extra oodles of RAM. Perhaps try dropping the res to 640x480 for an experiment?
Incidentally 4.x didn't work because of this:
http://www.hpcfactor.com/support/cesd/s/0060.asp