Disable auto Send & Receive All

Version: 2008
Operating System: Mac OS X 10.5 (Leopard)
Processor: intel
Email Client: Exchange

Under schedules you have the ability to disable Send & Receive, but it still auto Sync's my inbox. I have noticed Send & Receive All stays BOLD and delete is greyed out?

I have even created a new Schedule called Sync Manually?

Will Entourage 2008 not allow you to sync manually when I choose!?!?!