Retina MacBook Pro is not connecting with Airport Extreme 5 GHz signal
I believe I have done my due diligence to find the answer to my question here and other places but I must be missing it. I have a Retina MacBook Pro that as far as I know should select the 5 GHz signal from my Airport Extreme (Generation 1 with 7.6.4 firmware) which is literally 3 ft. from my computer. When I click on the Airport icon in the menu bar, it is indicating a 2.4 GHz connection. I have looked at discussions which say I can give separate names to to both the 2.4 GHz and 5 GHz signals. I can't seem to find that. I also read where you can reorder the order of signal preference. I can't seem to find that either. Interestingly, I have an Airport Express that is extending the network. When option clicking on its icon in airport utility, I can see both the 2.4 and 5 GHz information. I don't se that in the Airport Extreme. I am thinking about gettng the newest Airport Extreme but if I don't need to...
Thanks for any help!
MacBook Pro with Retina display, OS X Mavericks (10.9.2)