ACEweb VFP Version Installation Issues
Installation Troubleshooting Tips:

It is likely that IIS has been improperly setup, or is not currently running. You will need to verify your IIS settings.
If you get Access Denied messages when trying to open the Home.htm page, check that the IIS Internet User account has the required permissions.

Your DataPath INI setting is incorrect, or your COM Mode Identity does not have permissions to access the Student Manager directory.

Check to make certain the COM Mode Identity is correct (i.e. user name and password), and that the Identity account has permissions to access the Student Manager data directory.
IMPORTANT: the ACEweb User Account/Password cannot expire. If it expires, ACEweb will not be able to access the Student Manager directory.

Verify the Script Maps are set up correctly in IIS Handler Mappings.
404 Errors can also be caused when 32-Bit Applications are not enabled on the West Wind WebConnection application pool on 64-bit servers.

Check the Application Pool settings for the Default Web Site and the Wconnect application in IIS. Both must use the West Wind WebConnection application pool.
See the Default Application Pool section of the Windows Server 2008/2012 Configuration topic if you cannot set the Default Web Site to use the West Wind application pool.

You may see this error when an Identity is set on the West Wind WebConnection application pool in IIS. It should be set to the ACEweb User account when the data resides on a different server. Check that the Identity listed has permissions to the Student Manager data directory.
If that does not resolve the issue, check the Launch and Activation permissions on the ACEweb DCOM server. The Identity account on the West Wind WebConnection application pool must have Local Launch and Local Activation persmissions.

Check that the ISAPI Extension has been allowed for ACEweb.

Check that Basic and Windows Authentication are enabled for the Default Web Site and the Wconnect application in IIS.