exclude local folders from synchronization

[<tet...@po...>]

Dears isync users and developers,

I want to have a local folder used as an archiving folder. So, I just 
simply copied my INBOX folder as INBOX_archive:
"cp -r INBOX INBOX_archive"

But, the problem is that when I synchronize against the IMAP server, 
isync tries to upload INBOX_archive into the IMAP server. I tried to 
exclude the folder using the Patterns keyword this way:
"Patterns INBOX !INBOX_archive"

But, this seems not to work. May I be doing something wrong with the 
syntax for the Pattern keyword?

     Thanks for your help, Tetumetal