Gravid Corn wont lay eggs

[bassteck76]

I could use some advice here.....I work at a very good petshop and we aquired a gravid cornsnake.....she is huge and will not give the eggs up so to speak....I have put her in a tank with a "eggbox" and she has heat water and so on.....I dont know what else to do with her to get her ready....I am afraid she may die if she doesnt do this quick.......

Thanks

Richard