Error Message: Proxy Reports: 87 The parameter Is Incorrect

ID: Q242211

The information in this article applies to:

Microsoft Proxy Server version 2.0
Microsoft BackOffice Small Business Server versions 4.0, 4.0a, 4.5

SYMPTOMS

When you connect from a client to a secure Web sites using a server that was upgraded to Proxy Server 2.0 and Internet Information Server (IIS) 4.0, you may receive the following error message in the client's browser:

Proxy Reports:
87 The parameter is incorrect.
An error occurred while trying to retrieve your URL.
This error could have been caused by:

CAUSE

This error message can occur if the Filter DLLs value in the following legacy registry key contains the paths to the Sspifilt.dll and W3proxy.dll files:

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\W3svc\Parameters

These ISAPI filter DLLs were required by previous versions of Proxy Server and IIS, but are no longer needed when you use IIS 4.0 and Proxy Server 2.0.

RESOLUTION

WARNING: Using Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.

For information about how to edit the registry, view the "Changing Keys and Values" Help topic in Registry Editor (Regedit.exe) or the "Add and Delete Information in the Registry" and "Edit Registry Data" Help topics in Regedt32.exe. Note that you should back up the registry before you edit it. If you are running Windows NT, you should also update your Emergency Repair Disk (ERD).
To resolve this issue use Registry editor to delete the Filter DLLs value from the following registry key:

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\W3svc\Parameters

Additional query words:

Keywords : kbenv kberrmsg
Version : winnt:2.0,4.0,4.0a,4.5
Platform : winnt
Issue type : kbprb