How do I sync emails, tasks, contacts and calendar?

Hi,

I have installed Zoho for Google apps and I can now add tasks when somebody emails me and check their information (so I know it is linked)

However, on the slides that help it has a setting in Zoho CRM that is Google Apps that allows you to change some settings, I don't have this.

How do I make it so Google Apps logs emails sent to clients into Zoho? I have purchased Zoho Mail.

Thanks