What you should be looking for in the driver test is a nice clean line with very little disturbance and no large spikes.
I looked at your xml and your pulse width is set to zero, try setting that to 10 and see if that helps, also the Dir one as well.
Check at your parallel port and see what voltage it is, most modern ones are just 3.3v and it will depend on your breakout board/drives whether they will be happy at that reduced voltage, if not that could be an issue.
Hood