connection problem with hidden SSID

At my work they have several Cisco Aironet 1200 Access points (AP). The AP have two SSID's. One SSID is visible and the other SSID is hidden. Both are secured with WPA TK-IP. Both work fine on laptops etc. I must use the second hidden SSID to connect to the internet.

I have successfully installed/configured the hidden SSID on my iPhone 3G but it is an half working solution.

Every time i want to use Wifi (hidden SSID), the iPhone 3G only uses 3G for internet.
Only when I go to Settings on the iPhone 3G, --> Wifi and wait a few secs the hidden SSID is visible and the iPhone connects perfectly. Then I press the home-button and I can use for example Safari or Mail over Wifi.

When I put the iPhone 3G to sleep en lets say use the iPhone 10 minutes later I only can use 3G for internet. No Wifi is visible.
In other means, the iPhone don't start the hidden SSID Wifi connection by itself 😟

The only way to work with the hidden SSID is going true settings, --> Wifi. Then the iPhone 3G finds the hidden SSID directly. Then when the iPhone stays on i can use WiFi (with the hidden SSID).


Is there an solution so that the iPhone 3G automatic connects tot the hidden SSID when I use the iPhone?



(I have erased the network settings via Setup. This don't solve the problem. Have iPhone 3G with firmware 2.2, problem also with firmware 2.1)