i am having the same issue.. i read this thread over a few times repeating this solution with no luck... i am considering buying the mach3 release so i can finally put my machine to use. it is a 5'x8'x14" router i built from scratch.
so far i have been running the old mach2 free release just to get my machine running. its running great!!! servo motors and geckos, computer is a p4 1.8, using the soundlogic breakout board.
mach2 runs it wonderfully. but mach3 doesnt do anything.... i set up mach3 exaclty as my mach2 is, no luck... i uninstalled the works even removing the hardware drivers, reboot, then reinstal, no luck... so i reinstalled mach2 again, and mach2 works fine as suspected...
got any ideas for me?
shnitzel