It is usually recomended to set up the incubator a few days ahead and make sure it is stablized for at least 24 hours before adding eggs. I understand you did not have that much advance notice, but it could be part of why they didn;t hatch. What is your humidity level? What brand of incubator do you have? The humidity should be raised until the last few days at "Lockdown". Humidity should be relatively low (around 30%) until then. After that around 60% should be fine. Most incubators have some sort of channels to hold water to increase humidity. The amount of water to add will vary by they specific incubator, time of year, exposure to drying unfluences such as forced air heating in the house, the amount of sun coming in thru the windows, etc.
