Error when accessing root folder

We are trying to host the filevista application on a public hosting server. We setup a root folder with path ~/root(root being a folder inside the application folder). But when I try to open the root on the main page I get a 
'Request for thep permission of type "System.Security.Permissions.RegistryPermission" failed'. How do I fix this. being a commercially hosted server, I dont have access to IIS on it to adjust permissions. Only thing I was able to do was give full read/write access to network service on the "root" folder.

Sorry, this is ASP.NET trust level issue. As of current version, FileVista requires registry access which is not possible under Medium-Trust level which  is the default level of some shared hosts.

In future versions, we will try to decrease the minimum level that the application requires to work.