I've got a spektrum dx4rpro and three sr2000 DSMR rx's. Turned my SCTE on the other day and it acted as if the rx was dead but it was powering the transponder. Truck ran just fine two weeks ago. Put a bind plug in it and got it going but it will only operate at the 11ms frame rate and not the 5.5. My other two rx's operate at 5.5 and this one used to

Does the SCTE have "Digital" Servos?

I believe they are required for the faster ms response times.

If it has the Hitec 7940TH from his signature it should be fine. A wild guess, maybe try binding to a new model on the transmitter?