what am i doing wrong?!

[DonLisk]

I think a few pics might help for ID of the frogs for you. Knowing species will help to determine temps and humidity levels needed for the to thrive. Below is some basic info and if you ID the frogs, then you may have to adjust some of the numbers below but its a start on the right track.

Keeping them at room temp at night (68 - 70 degrees) should be fine. Day temps 75 to 78 should be good too.

Humidity should probably be around 50 percent and not higher than 70 I would believe.
Stress is the biggest killer to frogs and providing them with enough space, a quiet surroundings, and plenty of places to hide is a must. I would move the under tank heater to a side since your only providing heat to the substrate and if they dig deep enough they are going to be right on top of the pad.
Add some lighting during the day with a compact florescent bulb at probably 13 watts. Give them a day and night time cycle.

Make sure the crickets are no longer than the distance between the frogs eyes and drop the mealworms for a bit. Also dust the crickets with some calcium powder at least twice a week.

and I have to ask, what live plants do you have in the tank? Did you remove the fertilized soil from the plants prior to putting in the tank?