chkinut-give it time.
Last week I woke up to 3 pips. Later in day 1 was zipping, and a 4th pipped. That left 2 eggs with nothing.
A 5th pipped, zipped and hatched without us even knowing the afternoon of the next day. Some could just be resting up still.
And lucky you, you got something going on. My 1st hatch I got zilch. 2nd hatch I got 1 out of 9 that made it to lockdown. And that one has a bad leg (hes still with us though), curly toes and walks on hock. Talk about frustrated, disappointed, angry, etc...
3rd hatch was 5/6 and today finished my 4th hatch with 4/4. 10 going on lockdown tomorrow...will candle tonight, but all were good last time.
Anyway, good luck. Be patient! And if all doesnt go well, open them and find out when stopped developing (I would give them till day 25 though). Its a learning experience and there is alot to learn from when all dont hatch.