SOLVED! I just re-install it and it worked! Great Component

I'm using joomla 2.5.13, VM 2.0.22a and PHP 5.3. I cannot configure CRON TASks in my hosting so I turned on the plugin but seems to be not working. When I configure it in automatic mode it doesn't do anything. I've changed the mailing interval to 5min but still....

Could someone help?

Thanks in advance