Execution of ServerDirector4.0i78.exe fails with error 1720, and the installation log (at C:\WINDOWS\system32\ServerDirector\temp) has the following message:
The source of the issue is a wrong value for property RootVer in ASP.NET registry key.
In order to fix the issue please follow the steps:
1) open Start -> Run -> regedit
2) Open HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\ASP.NET
3) Set RootVer = 1.1.4322.0
After setting the correct value for RootVer, execute ServerDirector4.0i78.exe once again.