check this in your keychain access control panel...
As I was trying the connection, I put the computer to sleep, it sleeps on its own fine, then upon wake it cant find the network? I tried my own hint of deleting the keychain and starting a new one, did it once (nothing happened) and then I decided to inspect the control access panel and one item was missing: which was the system preferences icon on this list, I add it to the list and now I tested it and I think its working great again so inspect your keychain access allowed apps.
As I was trying the connection, I put the computer to sleep, it sleeps on its own fine, then upon wake it cant find the network? I tried my own hint of deleting the keychain and starting a new one, did it once (nothing happened) and then I decided to inspect the control access panel and one item was missing: which was the system preferences icon on this list, I add it to the list and now I tested it and I think its working great again so inspect your keychain access allowed apps.