You need to start the JVisualVM with the same user thas that is used to start the engine service.
See the service properties in the "Log on" tab. ![alt text][1]
In most cases it is sufficient to right click on the jvisualvm binary an run it as administrator. Otherwise you can use "runas" to start a windows process with as a special user.
![alt text][1]
[1]: http://answers.axonivy.com/upfiles/serviceAccount.PNG