I can't say for sure, but usually these types of failures are related to user permissions. So, the analyzer is attempting to copy one of its files to the location where your ISS DLL resides. Does the user account that is running the VTune analyzer 1) have access to the VTune analyzer file and directory, and 2) does the analyzer have access to the directory where the DLL resides? Are there any access limitations?
Otherwise, can you tell us which version of your OS and ISS are running on this system? Perhaps we can attempt to duplicate the problem.