Máš na disku soubor C:\Windows\System32\inetsrv\asp.dll?
Zkontroluj taky log %systemdrive%\inetpub\logs\LogFiles\W3SVC1\*.log
Můžeš zkusit následující:
Make sure you're in Features View (not Content View), then double-click the ASP icon. Expand "Compilation" and then "Debugging Properties". Set the "Send Errors To Browser" to True. Now when you browse the ASP page, you should get the underlying script error, instead of the default "An error occurred". This will help troubleshooting efforts.
Když nepomůže, tak ještě:
If you are using Vista build, you need to make the following change to see the error message.
1) Internet Option:
uncheck "Show friendly HTTP error message" check box
2) IIS Settings:
cscript %systemdrive%\inetpub\adminiscripts\adsutil.vbs set w3svc/AspScriptErrorSentToBrowser true (to allow error message send to client)