My HP Laser printer gL-5 worked fine. now I bought a Zip drive250 MB,Parallel Port which works fine, but now my Laser printer is on the by-pass of the Zip drive and my printer doesn't work anymore, unless I disconnect the Zip drive. Is there any way to rectifiy this problem, short of installing a second Parallel port? I don't have a USB on my computer, which is 5 years old (AST).