I am using Pivot Table and Pivot Chart Web part on SPSS 2003. I can
use these components on my Home Site without any problem, however
when I want to use these components on another site, I have a
problem. I can drag the Pivot Table component from Virtual Server
gallery , but on the web part I get a message like this:

To use either the Spreadsheet Web Part or the PivotView Web Part,
you must have Microsoft Internet Explorer 5.01 Service Pack 2 (SP2)
or later and the Microsoft Office 2003 Web Components installed on
your computer. See the Microsoft Office Web site for more
information.
Install the Office 2003 Web Components.

Since these web parts work on Home Site, the problem can not be
related to installation.