Cockroaches are very difficult to control and it can take quite some time even with very diligent control measures. Perhaps this link will be of some help.

http://www.doyourownpestcontrol.com/roaches.htm

kimmq is kimmsr

Biker, an infestation of roaches is very bad news. They are extremely challenging to control once they've established themselves into the human environment.

A professional exterminator might be the smartest and safest way to go, at least initially. They have superior knowledge of where the roaches live and breed, and the right products to get rid of them safely and effeciently.

A pro will know which species has invaded your home, its habits, and by which methods will be most effective.

The wrong chemicals in the hands of homeowners who don't know how or where to use them can create dangerous environments.

Once the roach population has been controlled, you may be able to keep it that way with insect growth regulators and baits or other products you can buy at the store.

But know this....eradication of cockroaches is impossible. It is well documentated that they have the ability to develop resistance to pesticides in one or two generations (cockroach generations not human).