I am running Mach 3.  I don't know what I did but my mill will no longer rapid when I press SHIFT + >.  It will advance one increment at a time when I press CNTRL + >.  When I press just >, it will move at 41 IPM, no matter what rate I have it set in the jog screen.  If I run a gcode with a G00 instruction, it rapids at the full 100 IPM.  Any idea what I screwed up?  It used to work properly. 

Thanks,
Vince