The Raspberry Pi does not require special code to be added to the roboRIO to stream the camera images back to the Dashboard.
Ensure you're following all the steps in: Vision with Raspberry Pi
If you have further problems, please detail your setup better. Which camera are you using? When you say you see the camera in the computer, are you referring to the RP's network connection?
We might want to move this thread to ChiefDelphi to ensure we have people more familiar with the WPI's implementation on the RPi get their eyes on this.