ThingTemplate Service Calls - Things[ThingName] is not running

I have a problem with calling services from a thing that uses a particular ThingTemplate.

I am creating the Thing programmatically:

var params = {

             thingTemplateName: equipmentTemplate,

             description: description,

             name: equipmentName

             };

        Resources["EntityServices"].CreateThing(params);

        Things[equipmentName].EnableThing();

        Things[equipmentName].RestartThing();

Which works fine, but when I try to call a service from that Thing:

...

Things[equipmentName].AddVisibilityPermission(params);

Then it throws a Things[equipmentName] is not running error.

This only happens when using one particular ThingTemplate as the 'equipmentTemplate', all other templates 'run' fine.

Does any one know why this might be happening? I can't find any permission issues, spelling errors or anything in that ThingTemplate. We did just upgrade to 6.5 - Would that have anything to do with this one ThingTemplate?