How to Restart the Integration Service
This needs to be done by someone with access to the Server where the Integration is held, this is usually the CRM Server.
CommuniGator Integration Manager
From here you can then stop and then start the service, you should see the status go red, and then green again on starting.
If you are unable to stop the service using the manager, you can manually end the process through task manager. You should then be able to start the integration service again through the manager screen