Using VEX Cortex to control FRC Robot help

[jrodprogramming]

Hi.
We read the thread about using VEX Cortex to control an FRC bot that was written some time last season. I am currently slightly confused as to how exactly the cortex should be connected to a Victor speed controller. I had it connected to the Digital Output using a male to male PWM cable and am running the Cortex itself off of a battery pack. I'm not sure what I'm doing wrong, but currently the Victor light still does not stabilize and continues to blink. Anyone know how to achieve this? (We're using this for our test robot while our other one is bagged).