I am going to try to keep it simple. I own a 24" Ioline Classic plotter that runs off a 25 pin (old school), I have upgraded over the years and recently decided to operate using Windows 7 (instead of 8) in a new HP computer with no COMM ports. So the problem is that I cannot get my Flexi Sign Pro 8.1 Production Manager to recognize the USB port. I have entered my IP address and it asks which Port number 9900 etc..??? What do I do to get the Manager to read my files to plot? I am not a techie by any means so please be specific. Hoping you genius type tech savvy pros can help me out!?