Thank you for your post, I am sorry to hear you have been having this problem.
The first thing to try is changing the parallel port that the software is addressing. The Windows XP operating system virtualises the port and it may be going by a different number. Try changing it to LPT2 by going to File | Setup | Converter, then restart the software. If this doesn't work then try LPT3.
If this doesn't help then check the parallel port settings in the BIOS. It should be set to:
SPP, Normal, Output Only or Unidirectional.
It should not be set to ECP, EPP or Bidirectional.
If none of these options exist then contact your PC's manufacturer for advice.
If you are still experiencing problems after trying what I have suggested then please do contact us again.