I use Windows 7 and Windows Live Mail.  Two e-mail addresses(@ Tiscali) are receiving and sending mail with no problem BUT I have just added another email to my account (@ Talktalk) and keep getting the error messages Server Error 0x800CCC90, Server response -ERR Authentification failed and Windows Live Mail Error ID 0x800CCC92.  Help please - I know that the password I put in is correct.