ROC V2 remote works fine with my CW700s
I have a ROC MULTI-SAT V2 remote and it works fine with my Captiveworks CW-700s. In fact it works with every receiver on its compatibility list that I have tried.
The blind scan on my CW700s is frustratingly slow, and all three versions of the OEM firmware for it are buggy. The CW600s is an slightly older model, and has a slower CPU.
May I suggest you send your CW600s back for a refund if you can.
Reloading the OEM software via a serial cable connection might fix it, if corrupted software is the problem. If it cannot be returned, I would try that.
The remote sensor may be bad, as others have suggested.
I never use my CW-700s since I got a Coolsat 6000 for aiming dishes and blind scanning.