I have two Aironets setup as below. They both have the radio configured and up. I suspect the issue is with the security. I am unfamiliar with how it works - if anyone can provide me any pointers, it would be much appreciated!
From memory it was due to authentication.. as I recall it only authenticates on one direction - there were a few configs I found on the net that were incorrect, but from testing I found this to the the case. I'd try it with no auth on to see if you can get them to connect up to each other, then add the authentication back on.