Webform Worflow notifaction I'm using D7, WebForm Module and Workflow Module.
When the user submit, the state change automatically to the first state.
Users to notify and the submitter user should receive normally the notification.
When i try nothing received!
Can anyone suggest to me, What can i do to prevent this problem from happening?
Without more information on the issue, there could be a lot of causes for this. For example, most emails are sent when cron runs, is cron set to run periodically? 

Are you able to see your logs on the site? 

If so, are there errors associated with email not being sent (Go to http://your-site-url/#overlay=admin/reports and select recent log messages)? Is your server configured to sent emails? 

Some error logs are found on your /etc/httpd/logs/error_log folder, looking there would be helpful too while you try and submit a form to see what gets logged.

As I mention above, more info perhaps can help us troubleshoot it. 

Hope this helps.