Airport looses AX when the MBP sleeps.

I had problems maintaining my computer's connection with my AX back in Novemer & December. Enough hints and enough fumbling around and I got a constant connection.
Then yesterday I changed the identity and password of my AX. Now anytime my computer sleeps, when it awakes Airport has lost the connection. My AX is set for WPA2/personnel and cloaked identity.
Coincidentally, I updated to the latest version of the Airport Utility. Connection?
Any ideas? Others with similar problems?

More information:
If I turn Airport off then back on, Airport connects to my AX.
I checked my Keychain. There was an entry for my old ID which I deleted. Made no difference.

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