So, if your RED Rocket card suddenly doesn't work--try this first:
1. Remove the RED Rocket and flip the #8 DIP switch on. (See picture)
2. Once the #8 DIP switch has been flipped on, put the card back into your machine then run the Driver then Firmware upgrades. http://www.red.com/support/8/release_history
3. After they are installed, remove the RED Rocket and flip the #8 Dip switch back to off and put the RED Rocket back into the system.
This is a good first step before RMA'ing the card back for replacement.