put u'r female every week for 1 full day to the male's enclosure. of course spray him daily. u should get him to attack her... in the half innocent way
Fattails are fairly similar to leopard geckos. First thing is you want the male to be around 40grams+ and the female 45+. I start cooling in the winter for about a month with the temps in the lows 70s to high 60s. After cooling I bring the temps up gradually over about a week. I feed through out the week and then put the males in with females. Within a month or so you should start checking for eggs. Use a moistened peat moss in a shoebox for the egg laying area.
One problem you may be having in humidity. Fattails do require a higher humidity, so I spray mine about twice a week.
Cooling is the most important part of breeding fattails, I'd say.