Admittedly, I have no zones installed but I doubt that is the problem. My system came yesterday short of any door/window sensors so I've just been playing with the console this evening (Yay! Dialed my cell phone after pressing panic button. Was somewhat concerned about that as I remember reading that alarms may not work with my cable telephone service.) Anyway, the fob I have has four buttons only. Panic, Stop (which indeed silences and/or disarms the system) and tghe two light buttons, but pressing the panic button for two blinks of the red light doesn't arm the console. Hanging on it for several more blinks triggers it. I've taken the batteries out and tried re-registering it but that was not successful. I haven't tried the other keyfob or the SH624 (I don't have enough batteries for it). I thought I'd check here for a possible simple explanation before registering the other keyfob. Thank you!