Airport Issue MacBook cant see 5GHz Mode N only network

[appleguy]

I got me when they were released
a White MacBook Intel Core Duo 2 2.16GHz
and an Original 1TB Time Capusle
I had it running on N only 5GHz and it was running fine.
but now for some reason it cant see the TC when in 5GHz mode. it can in N only 2.4GHz Mode.
Any ideas?
I did go to re-run the 802.11n enabler on it. but I cant as it is now running 10.6 on the machine
I have updated to 10.6.4 that still hasnt fixed the issue
I really want it on the 5GHz as my microwave interferes on the 2.4 range

 

[eman]

10.6 already has the 802.11N enabler built into the OS. Go to the network setting (system preferences/network/advanced) and delete the SSID's you're having problems with and restart your macbook; try to connect to 5GHz network and hopefully this will get your macbook back working.

 

[appleguy]

I tried that..
I got it to work by downgrading the firmware to 7.4.1

 

[eman]

You downgraded the firmware on your TC, glad to see you got it figured out.