The pair should be about 12 months old for breeding and in healthy condition.
For the female to lay sucessfuly with healthy eggs you should be feeding her a varied diet with a lot of calcium w/o d3 dusted on the food most of the time.
She should lay the eggs 20-40 days after copulation (breeding).
Though I have had a female lay on the 17th day of gravidity (17 days pregnant)
The temperatures in the cage should be normal, you dont need to heat up the egg laying bin, it isnt very necesary but some people like to do that.
The egg bin should have playsand or fine dirt (top soil) for her to dig and lay in, it also should be moist but not drenching wet and then compressed so that when she digs the tunnel will not collapse ontop of her.
I like to dig 2 holes for the female in the corner, with all my females they have used these predug holes and made a bit of extension on them and then layed the eggs in them.
Apparently they can dig a few "test holes" before choosing one to lay in, mine have never done this and usualy stuck to one hole and done the job within 1 day.
The egg laying bin should be fairly large and tall for her to dig and lay how she prefers (the dirt should be alteast 10")
When you know she is starting to dig and lay then give her privacy or she will not lay and die eggbound.
When you say it was "not succesful" do you mean that she was bred with the male and did not lay her eggs or she did not develope eggs or she laid eggs and those eggs did not do well?
