Keeps coming up with message;

Header download for the '[Google Mail]' folder did not complete. Could not
select '[Google Mail]' on the IMAP server. You might try refreshing your
folder list to synchronize with the IMAP server. Account: 'imap.gmail.com',
Server: 'imap.gmail.com', Protocol: IMAP, Server Response: 'Unknown Mailbox:
[Google Mail] (Failure)', Port: 993, Secure(SSL): Yes, Error Number:
0x800CCCD2

How do i refresh my folder list to synchronize with imap server, have
followed every other instruction to the letter however keep getting this
reply everything else is good..

your help would be greatly appreciated.

Thank you!!!