Betta Breeding Problems...
 

Try keeping them nice and warm, and feed both male and female things like bloodworms and all. Change a little of the water every day too. Makes them think it's monsoon season. If you have weather fronts coming in(storms) then try to breed right when that starts. Storms really set off breeding behavior.
The male should really pursue her, so it's possible that since he isn't showing enough interest, she isn't responding properly either. Good luck!
Wolfy

What worked best for me was taking a 10 gallon tank and filling it half-way. Set the temp for 80 degrees. Get a transparent divider and put one betta on each side. On the male's side float an plastic lid or some fake floating plants so he can build his bubble nest. I usually gave the male and female several days before introducing them. Then I would remove the divider and give them some time. Once they get eggs and the male has collected all the eggs, I removed the female. Feeding bloodworms and mysis shrimp, frozen krill and betta food worked well for me. Do include some plants for the female to have some cover should the male be a little too aggressive and she needs some space.
You may need to separate them for some time and then re-introduce them as mentioned above. It worked very well for me but I never got a chance to get the fry past the first 4 weeks due to not getting the bugs out of my first time trying and overfeeding errors. Good luck, hope it works.

Thanks! I just have a quesion.. How do I get the food for babies? I heard they need some small... krill stuff but they don't have it at my local pet shop... so how do I get it???

You can grow your own microworms or vinegar eels. A google search should give you some people who sell starter cultures. They are easy to grow(oatmeal/cornmeal/mashed taters for the microworms and apple cider vinegar/water mix for the vinegar eels) or you can hatch baby brine shrimp and feed them that, although the smallest fry won't be able to eat baby brine shrimp.
Good luck!
Wolfy

Ocean Nutrition Atison's Betta Starter is also good. Promotes nice color and good growth. That worked well for me. I tried liquid fry food but found it too messy to deal with.
One thing I forgot when introducing them. When you have the dividers up, look for the female starting to look fat as eggs develop. That is the best time to introduce them. You will most likely have them mating within 24-48 hours after that.

Actually today I noticed she got fat but she dosen't seem to swim much(looks like she can't) and she just stays on the bottom. I don't know if this is normal..

I don't remember that happening with mine. How old is she? Does she respond when the male comes close by?

I tried breeding bettas when I was 14. I had them both in a gallon fishbowl and the male ate the female when I was asleep, lol.

Now I just stick with the male.. Oddly enough, he's the first betta I've had that didn't die in a month.. He's still goin' strong.