Strange Macbook connectivity problem

I have the latest Macbook with 802.11 a,b,g and N installed and enabled.
I also have an Apple AirPort Extreme (802.11n) with an Apple TV connected to it.
Strange thing is that when I enable 802.11n only (5GHZ) on the wireless router,only the Apple TV will connect.
Nothing I do to the Macbook will allow it to connect at 802.11n. If I reconfigure the Airport to 802.11 g ,a and n the Macbook will then see the wireless network,and connect.
This defeates the object,as I wanted to seperate the Apple TV and the Macbook from the rest of my 802.11g devises.
The Airport is connected via a wired connection to a router.
It opperates in Bridge mode.
Can anyone help.
Cheers
Eli

If you have the newest MacBook then the following link can help: http://store.apple.com/1-800-MY-APPLE/WebObjects/AppleStore.woa/wa/RSLID?mco=36A 3C0EC&nplm=D4141ZM/A
You need that update to make your MacBook n compatible. But only the newest one will work. Or if you got the AEBS, and installed the CD, then it should have put it on so you don't need to buy that.

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Regards form Curacao, Dutch Caribean.
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