Created a namespace extension rooted at a file system folder using EZnamespaceextension

I have created a namespace extension rooted at a file system folder using EZnamespaceextension for a virtual drive to show my custom view but when i register it, it does not show anything. But if I register it for a normal drive it shows its custom view and working perfectly . I am doing it for my personal interest and as a testing basis.

Could anyone suggest me why it is not showing the custom view to the specific virtual drive?