Mastercam X7 not working with wincnc

I'm pretty new at this and am a bit over my head.

I'm trying to get mastercam to work with wincnc but it just isn't happening. I keep getting "arc radius" errors so I think it has something to do with g90 and g91.

I downloaded the mastercam post from the wincnc website and it isn't working. Anyone have any ideas of what to do?

Here is the offending code

G20
G90
G40
G80
G49
G0
M03
Z0
G52
X0.Y0.Z0.
G54
G0X1.2561Y.9431
M3
G43H1Z2.
Z1.
G0X3.0704Y3.0732
G1X1.2561F50.
G0Z2.
G54X1.5797Y2.8827Z2.081
Z1.
G1Z-.0106F1.
Y2.819F50.
G2X1.4547Y2.694I-.125J0. <=== offending line
G1X1.2877

check to make certain that both master cam post and wincnc are set for the same arc protocol, if they don't match up you can get some pretty weird results.