Windows Live Mail Error ID: 0x800CCC0F

Hi !

Please, could you be so kind as to help me?
I haven't received any message in my Windows Live Mail for 15 days.

Unable to send or receive messages for my Gmail account. 

Server Response: AUTHENTICATIONFAILED] Invalid credentials (Failure)
Server: 'imap.gmail.com'
Windows Live Mail Error ID: 0x800CCC0F
Protocol: IMAP
Port: 993
Secure(SSL): Yes

Thank you for your help.