[QuakeWork120]

Well, lets examine what's going on here:

The wiring is right on the nitro. Nothing wrong there unless you don't know how to wire things right. I'll give you credit here, though and assume that you do know how to.

When you give it a shot of nitrous and get 5000-6500 RPM, the car freezes and you get a fuel injector error code.

Questions:
Do you have stock injectors?
What is the rev-limiter set to?
What about your ECU? I am not too familiar with the Venom, so I do not know if it is the stock ECU.

If you do have the stock injectors, chances are you are sending them too much fuel for their capacity. Get high flow injectors/fuel rail.

If the rev-limiter is set near 5000-6500 (which I doubt at this point), try to change it

If you have the stock ECU, get a performance ECU. The ECU may not be capable of handling the extra fuel flow. The injectors tell the ECU how much fuel is going through the engine.

Other than that, you might just have a problem with the injectors being compatible with the venom computer.

I would personally suggest calling Venom for more help.