It seem very annoying whet the applet keep ask for the password when i try to use the wireless after the first boot. I manage to sovlve it by removing all file in .gnome2/keyrings folder in my home directory. After that reboot the laptop and when it ask for the keyring just press ok without enter the password. It will ask if you are sure and you just have to choose yes.
Hope this helps somebody with the same issue with wireless.