How long do you have the rain chamber running for? What is the temp and humidity in the rainchamber? Did you cool them down a bit before hand? I usually find adding cold water to the bottom for a couple of days before turning on the pump and heater works well. Then after a few days turn the heater on to get it nice and humid then turn the pump on. I find it also works better if you can turn the pump off occasionally even at night on one or two days, as long as it stays humid. I usually leave mine in for a week before stopping.I bred mine recently and the males (I reccomend having more than one as the competion helps) were in and out of amplexus for about the first 3 or 4 days and then one pair laid on the 5th morning. The other female didn't look like she was readykeptkicking the males off.