Wescrock is talking about a laptop...
This is a common questions on here... and the answer is you cannot use more than 2 displays. The same thing happens to everyone who tries it, when u activate a 3rd, u lose ur laptop monitor.
This just a limitation of almost everything. You're laptop doesnt even have a real video card... just integrated motherboard video. Even my Asus with a GTX260m cannot do it.
To my knowledge, the only laptop that can do this is one with the ATI 5870. There are only 2 i know of... the Asus g73jh and some top end Dell i beleive.
The only way you are going to do this is to buy one of those laptops.