Epson 670 on Network

I have an Epson LQ670 on a Network connected directly to a Win98
machine and shared. All the other PCs on the network can print their
invoices to it with no trouble. We have just added a Win2000 machine
and the printing is incorrect. We have made a special form, checked
fonts, checked drivers and settings inside the accounting program, but
nothing works. The registration is off, printing the right hand column
too far over, so the figures cannot be read properly.
Anyone can help with this please?
neil mcmullen