The camera not going off probably doesn't help you, the cameras are not perfect and falsely trigger or fail to trigger all the time. Which is why the they are required to be reviewed before spending you a ticket. On the contrary, it probably would have been better for you if it did go off and you didn't run the red.

But always talk to a traffic lawyer anyways, having a clean record or at least not having something on your record recently is still probably your best defense.