How to synchronize Google Contact with Simple CRM?

For Google APPS

Google APPS :  go to l'URL http://www.google.com/intx/fr/enterprise/apps/business/ - CONNECT, then choose your domain name (my company. Com ) and Gmail and press OK

Google APPS connection page (insert the principal administration email)

Go to OTHER COMMANDS -> SECURITY -> Advanced settings-> Authentication-> Manage ACCESS to OAuth; in the “Name” box insert crm-simple.com; in “one or several API extension” case insert http://www.google.com/m8/feeds/