Automatic login

785

I'm using the AirCard Smart Cradle in combination with the Aircard 785. I'm facing the following problem: I'm connected with my iphone to the Internet and everything works fine. When I leave the house and return back home it sometimes happens that I'm not automatically get connected back to the router. I can see the network, but when I try to connect it always gives an error message "wrong password", although the password is correct (same happes when I re-enter the correct password). I then switch of the AirCard Smart Cradle and the iphone then connects automatically to the Aircard 785. Then I switch on again the Cradle and the iphone automatically connects correctly - without entering the password. This happens maybe every 3rd or 4th time, so sometimes it connects as it should, sometimes it doesn't. This happens only to the iphone and also to the Samsung of my wife. All other connections, including my labtop, WLAN radio, webcams, etc. are all connected without problems.

Any idea how to solve this issue?