List of wireless connections available

Question

Hi: You've already fixed 1 problem for me. But now I've another. Under the list of wireless connections, there is a linksys which is barely there and I can't move away from the router and stay online. There is another connection which I'm sure is mine but there is a gold lock next to it. How do I unlock this, or how do I make a new wireless connection?
Thanks for your help.
Sonja