Fox
It didn't work.
After DeMarco Murray was stuffed for no gain on 3rd & 1, the refs spotted the ball one yard short of the first-down line. After the play, Romo poked the ball forward with his foot right in front of everyone.
The refs noticed, and the Cowboys were forced to punt. Good effort, though.
Here's the GIF, the ball is between the refs legs (via BI's @corkgaines):