Hi
I realise you have posted in the TC base but you might consider downloading the wicd package and run
wicd-gtk
expand the graphical panel and re-check your password
also this app may allow you to ignore networks that are not yours so only yours shows up
assuming you are trying to connect to a router....forgive me if you are doing something else
2) you may like to review the contents of your /home/tc/wifi.db which can be viewed by a text editor
it might contain an error not easily spotted?