Time Between Mating and First Clutch

[Fencer04]

I successfully mated two geckos on 5/10/2011 and 6/7/2011 and have yet to have the female lay a clutch of eggs and she doesn't appear to be carrying. I waited a month the first time and decided to reintroduce since the first time was "the first time" for both geckos. Now it's been a month since the second mating and still nothing.

Would you pair them again? Is the female a dud? Any thoughts are appreciated.