I?m using Vectorworks 11 Architect on Windows XP and I have a HP Designjet 500PS printer. When I batch print a set of drawings not all of the drawings I selected print. Also, in this batch some of the drawings will print twice, all the others once. After I print a set, I have to select and batch print the drawings that did not print. Yesterday, I selected one drawing in the batch print and a different drawing printed. This happened twice in a row. I need some help with this. Another anomaly is that some of the time the prints look excellent, with black lines and proper color fills. Other times all the black lines are not jet black, they have a dark green cast to them. Thoughts?