In Outlook 2010 I have changed the Root Folder Path for my Gmail account to [Gmail]. This tidies up the display in Outlook

Because I have sub folders in my Outlook inbox I have changed Label name of the folders in Gmail like this:[gmail]/INBOX/Accounts. The subfolder Accounts should now be displayed as a sub folder to the inbox folder - even though Gmail does not work with sub folders.

Outlook is now struggling to sync my emails. The process is taking forever! no error occurs.
Why is this?