Digital BW, The Print

I am having a problem printing with my 1280 which just recently 
started. I am using a PC with Windows 98 and Piezography v 6.0.2.  
After I set up the dialog box, when I press OK to print, the paper 
pulls all the way through the printer in one motion and stops in the 
exit tray without printing.  Then the computer locks up with 
hourglass and I need to reboot the computer and close and restart the 
printer to try again.,  What is most frustrating is this is 
intermittent, actually happening about 50% of the time in the last 
couple of weeks.  I can't figure out a pattern.  It doesn't seem to 
be related to paper type, thickness or size.  It doesn't matter what 
setting I use in the Piezo dialog box, and in fact has even happened 
when I try to print just with the Epson driver.  I have reinstalled 
my Epson and Piezo software multiple times.  I can't figure out 
whether this is a software issue, or whether there is a problem with 
the paper feed in the printer.  I have the paper level set to + where 
I have always had it set because I am using EAM and PhotoRag papers. 
I am out of idea.  Thanks in advance for your help.

Matthew Kraus