I recieve the error when trying to Import HR Data or add a new ImportConfig file to the Blueprint Enterprise system.
The message being seen is: Error: "Unable to create an instance of the PharosSystems.Core.EntryInstaller installer type."
The below KB Article is a first place to look at a few settings.
Below is a link from a web site to obtain there tool that can be used for Windows Server 2008. From an MSDN Blog below is a lot of information on configuration/setup of the "Details about setup for the .NET Framework 2.0 configuration tool".
This msdn blog has a lot of good info in it although I have not gone through the whole thing as I did not need the whole SDK to be installed on my server but hopefully this will help sort out the permissions issue that causes the error.