Export data to Excel

Hi,
i ralise that his question has been asked and i have read all the posts, but
still no luck.
Im trying to export data to an excel file but do not succeed.
I have locked at the examples
, http://displaytag.homeip.net/displaytag-examples-1.1/example-export.jsp, but
can not get it to work. The example shows exactly what i want to achive.

Here is parts of my jsp code:

<dt:table name="userVOList" id="uservo" cellspacing="0" export="true"
requestURI="userSearch" cellpadding="2"
decorator="com.teliasonera.wal.www.decorator.UserSearchDecorator">
<dt:setProperty
name="export.pdf.filename" value="example.pdf" />
<dt:setProperty
name="export.rtf.filename" value="example.rtf" />
<dt:setProperty
name="export.excel.filename" value="example.xls" />
<dt:setProperty name="export.csv"
value="false" />
<dt:setProperty name="export.xml"
value="false" />
<dt:setProperty
name="export.excel.class"
value="org.displaytag.export.ExcelView" />

As you can see i have set the "export" attribute to true and the Excel link
appears
at the end of my table in the jsp page.
When I press the "excel link" I am redirected to the same page again!!
What am I missing ?
Do I need to configure something in my xwork.xml file or what ?
I hav put this in my web.xml file:

filter-name>ResponseOverrideFilter</filter-name>
<filter-class>org.displaytag.filter.ResponseOverrideFilter</filter-class>
</filter>

<filter-mapping>
<filter-name>ResponseOverrideFilter</filter-name>
<url-pattern>*.do</url-pattern>
</filter-mapping>

<filter-mapping>
<filter-name>ResponseOverrideFilter</filter-name>
<url-pattern>*.jsp</url-pattern>

What am i missing ?