hope this help

1. 支持全中文检索
2. for your ref:
=============================
======================================================================
---------------------------------------------------------------------
The information in this article applies to:

- Microsoft Index Server version 2.0
---------------------------------------------------------------------

SYMPTOMS
========

When you install Microsoft Index Server version 2.0 after Microsoft
Inte.net Information Server (IIS) version 4.0 has been installed, you may
receive the following error message:

   IS failed to modify the metabase.

CAUSE
=====

This error message appears when the script map is larger than 2 KB. This
is usually the result of installing products that create duplicate script
map entries.

WORKAROUND
==========

To allow installation of Index Server, you can remove any duplicate or
unused entries from the script map. To modify these mappings, follow these
steps:

1. In the Microsoft Management Console, go to the Properties dialog box
   for your Web site.

2. Select the Home Directory tab, and then click the Configuration button.

3. The Application Mappings dialog box should appear. Review the current
   mappings and remove any duplicates or mappings that you are not using.

STATUS
======

Microsoft has confirmed this to be a problem in Index Server version 2.0.

MORE INFORMATION
================

Certain applications create duplicate script map entries for each Web site
in IIS. For example, if you have 50 Web sites, then you would end up with
50 identical mappings. The 2-KB script map limitation is only for
installation of Index Server.

原文转自：http://www.ltesting.net