Hello,

I also have the same error message when trying to install DNN in my ISP. The installation goes fine until the last step: DNN app is intalled and modules are istalled but the script "Creating Portal:Mywebsite" fails.

This is the error message:

Error: Request for the permission of type 'System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed

It happens after my ISP changed the security level of the .NET environment to 'Medium Trust'.

After that security policy change, I also get the same error message in other production site when I try to upload/install any new module or skin, as described in this thread:

http://www.dotnetnuke.com/Community/ForumsDotNetNuke/tabid/795/forumid/108/threadid/89236/scope/posts/Default.aspx

Fernando

Well, I think this is definitely a trust issue and DNN is not 100% compatible with DNN running in medium trust in an ISP environment. 

I have encountered this issue on several occasions and fortunately I am now able to run DNN in a higher trust level than medium.

The problem is most likely (I had the very same error once) that the asp.net Identiy does not have priviliges on the root of the harddrive. This may happen when websites are hosted on a dedicated harddrive. Per Default windows will give sufficient permissions to every user, but if this a dedicated harddrive it may not.

The least permission that the asp.net identity must have on the root of the harddrive where it is installed is List Folders (apply to: All subfolders)

I cannot say under which circumstances this permission key is needed by the app, but as you have figured yet, it sometimes it is need.

Hope tat helps

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Cheers, Philipp Becker, Peppertree Solutions