Contacts and Accounts sync problems

Contacts and Accounts sync problems

Hi,
I have follow with many interest the CRM to Support synchronisation topics and try to test them.
I have follow the tutorial found in :  http://www.zoho.com/support/help/zohocrm-integration.html

I have try this 3 times but nothing appears on my Support contacts.
The import still staying "In progress" on the Zoho CRM import configuration.
I have try to change the sync method with Manual ou hourly but the end is the same.

We use CRM, Project and Invoice modules and Support will be very usefull for us.
Please give me some information about this, May I've do something wrong ?