Cannot use 3d vision on my Alienware M17x R3

Hi!! I hope you can help me with my problem...

I followed this steps:

http://support.dell.com/support/topics/global.aspx/support/kcs/document?c=us&cs=19&docid=559681&l=en&s=dhs

... but in step number 4, where i should see the laptop option (3D Vision Built-in IR Emitter) i find this option missing. Instead of that, i find 4 options:

- USB IR emitter and glasses  (I dont have an USB IR emitter!! )

- Wired Glasses

- Pro Hub and Glasses

- Discover Glasses

I have tryed everything i could imagine to fix this, and i alreado have instaled the last Nvidia notebook drivers but... no success

I hope someone can help me. I really was wishing to try the stereoscopic 3d..

Thanks you very much!!