We have two new machines with XP pro loaded with ram & vid ram. We use acad 02/ adt 3.3. For the past six months plotting has been normal. (Same as our Win98 se machines). We plot to a win98 server to an HP 1050c. Our cad is NOT on the server each station has it' s own copy of cad. All of a sudden 2 days apart, the PLOT PROGRESS screen freezes. When we click cancel it plots. If we don't show the print progress it plots normally. I tried the newest HP drivers to no avail. Nothing has changed on our system. Why would it suddenly do this, and how do I fix it. Thanks, Rick