SSID Association problems

I am having a problem getting a 2.9.27 Client Station to see a 2.8.27 AP. If I hide the AP’s ssid the client cant fine it, even with the correct ssid info installedin the client station. If I un-hide the AP’s ssid it connects just fine and works perfectly. Once the client station is connected I can re-hide the AP’s ssid and the client stations works just fine until the Client system is rebooted or shutdown for the night. Then I have to un-hide the AP’ssid again to get it to reconnect. What gives? I am using Senao 2511’s in both systems. I have tried pre/post 2.9.25 and just about every thing else that I could think of. I even RTFM and I just dont see where the problem is. Any thoughts?

Oops Sorry posted in the wrong topic.