deleting "Enter Network Password" screen

I installed an Ethernet card to connect up to DSL.
Installation successfull without any problems. However now
when I boot up or restart my computer, during the boot up
a "Enter Network Password" screen comes up asking me to
enter a password. I don't type in a password,just click OK
and my system continues the booting up and all is well.
How can I delete this screen?


Jack Bonaccolta