Not all nodes showing as managed in Orion

I have just recently setup and deployed my Virtualization Manager and for the most part it works wonderfully. I am having an issue with nodes not being able to be managed from the Orion web console. When I go to open a various node from the console and select Virtualization summary from the left hand side I get a message stating that I need to configure the manager. This is not always the case though, some nodes work just fine. Any thought?