Can I Manually Insert A Password In Keychain?

Here's my problem: I have a new network. All of my computers, iPads, and iPhones -- except my MBP -- were able to log on the first time and save the password to the keychain.

When I tried to do it with the MBP, I got a box that said "Connection Failed" -- but, I was actually logged on. However, the password was never stored.

So, I have to log on every time I start up or after the computer sleeps.

If I log on without the "Remember Password" box checked, I get logged on, without a "connection failed" message.

So, I'm assuming that I have a problem with the keychain. If I don't try to save the password, I get on without a message. If I try to save it, I get on but with the message.

Either way, it's a pain to have to log on in my own home.

I know nothing about the Keychain.

Anyone see a solution?

TIA

Steve

PS. I am running 10.7.3

The Router Is Not in the Keychain

So, I want to try to add it. Just looked through the key chain and there seems to be a way to add something new -- but I'm not sure how to fill the boxes in the entry window. Not sure what they are asking for.

Is there somewhere where this is explained?

Am I right, that once I enter it manually, I'll be locked in and need not log in each time i start up my computer?

Thanks for the help.

sjh