My sites are hosted at Mosso (Rackspace Cloud Hosting).  I just created some new sites and cannot install any new components.  I am using DNN version 4.92 and a standard web.config file.  I get the following message when I try to install a new container:

Error: Upload Container Package is currently unavailable.
DotNetNuke.Services.Exceptions.ModuleLoadException: Request for the permission of type 'System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed. ---> System.Security.SecurityException: Request for the permission of type 'System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed. at System.Security.CodeAccessSecurityEngine.Check(Object demand, StackCrawlMark& stackMark, Boolean isPermSet) at System.Security.CodeAccessPermission.Demand() at System.IO.Directory.InternalCreateDirectory(String fullPath, String path, DirectorySecurity dirSecurity) at System.IO.Directory.CreateDirectory(String path, DirectorySecurity directorySecurity) at DotNetNuke.UI.Skins.SkinController.UploadSkin(String RootPath, String SkinRoot, String SkinName, Stream objInputStream) at DotNetNuke.Modules.Admin.FileSystem.WebUpload.cmdAdd_Click(Object sender, EventArgs e) The action that failed was: Demand The type of the first permission that failed was: System.Security.Permissions.FileIOPermission The Zone of the assembly that failed was: Intranet --- End of inner exception stack trace ---

Mosso tells me that they now allow medium trust on all new sites.  They say that this should only require a minor change in the config file, but they cannot tell me what it should be.

Can anyone help, PLEASE!

Colin Kelly