You installed XP 32 bit? Important not 64.

And Camsoft was the first software you installed? Important to not have galil drivers in there.

If so, this has never given a problem for me.

My two cents, if you are not willing to pay them, its just as well you got jammed right away. You are almost certainly going to have other issues. Camsoft is NOT easy for the first time installer, there's a steep learning curve.

PS comparing Mach to Camsoft is like comparing a pea shooter to a cruise missile.