I have 3 different email address linked to my Windows Live Mail. Two of them are receiving and sending messages okay however my email is not.

When I first open the email program I get the following error message

"Unable to send or receive messages for ...........@gmail.com"

I then press Send/Receive and then get error message

"The server has rejected your login. Please verify that your username and password are correct"

When I click OK I get a dialogue box to enter my username and password (prefilled). I clicked OK and it came back to "the server has rejected your login" I tried several other usernames and passwords but it has not accepted any of them.

How do I overcome this issue? Or, how do I change my password?