How are your temps? perhaps they are way to cool, or hot... I believe these eggs incubate around 80F ideally. How long have you had the eggs? I've gotten 8 from mine and no babies yet, and i have 2 males and 2 females....possibly 2(found and looked to have hatched) or more eggs (not found) have hatched and i just havent found the babies yet, but the other 6 i pulled and am watching. I think they need like 45 days or so to hatch, i cant remember right off hand. Perhaps you have young animals also, just entering breeding age?