I've looked and looked for someone with the exact problem as I have. No luck. I'm switching all my trucks to spectrum from flysky. I purchases a couple 2channel receivers bc the hobby shop guy said they were comparable. I'm new to spectrum. So... I cannot bind the dx4c to any of my sr200wp receivers. DSM receivers. Manual says dx4c is comparable with DSM,dsmr,etc. So why can't I bind these to it? Receiver goes in bind mode as expected. I press bind in radio. Bind light goes off??? Then that's it. Nothing. Keep in mind I have bind 5 other receivers to this radio with no problem dsmr and DSM alike. But these waterproof ****ers won't bind. What am I doing wrong. I've tried stepping away 8-10feet as manual says. I've shut down my home WiFi as recommended on another site. Any advice besides return them?