Just looked at the xml and it looks fine and actually have your old one as well and its identical as far as pin setups etc .
Try the reinstall and make sure you dont uncheck the parallel port driver option.
If that fails run the drivertest and see if its ok, its in the Mach3 folder, just double click it.
Wont be around much longer as its 1:30am but I am sure someone else will help you out if these things dont work.
Hood