You may be asked for a password every time you log in so that you can connect to a network. You can stop this from happening like so:
Right click the Network Manager icon and choose Edit Connections.
Go to the Wireless tab, select the connection you are using and click.
Check Available to all users and click. Enter your password when asked.
The next time you log in, you should not need to enter your password in order to connect to your network connection.
14th of June, 2011