If you look at the Returning participants 'application' link on the main site page. You see under the listing of available applications that AutoDock Vina is only available in Linux flavors, and there is no windows version available.
So if you want to run it in a VM linux machine then it would find it.
So it is just an informational message, that it is not able to run Autodock VINA. You will also see that some are only 32 bit applications.
I am currently running a AutoDock VINA Wu on a Linux machine.