Need help

I have just finished a diy cnc router using a TB6560 to get me going,
I have an old Xp laptop that seems to work all axis fine, but on reading on the forums laptops are not supported.

On this I got a desktop pc running xp and a PCI Express card for parallel port, all checks out in device manager and Mach3
problem I have is Y&Z axis work but X doe's not, I have checked all settings for the TB6560 on both laptop and Pc and all are same.
I'd rather not use laptop as its very old, and my pc has a nice 19" monitor.

Please Help
Thanks