pulse/direction(pc 2 outputs cncpro) to emerson servo drive

I have a fx455 emerson servo drive which I have set to
Pulse/direction (it says it needs 4 inputs (#4+ #2-CW, and #5+ #3-CCW)
I only have 2 outputs from cnc pro Step/Direction from the PC. How
should I connect to the drive? and will the direct outputs from the
PC drive the servo drive? Any help would be great Thanks, Dave