Data Extract Command in Viewer, specifying the data extract format in the URL

uptimeken

The following URL:<br />
<br />
<a class='bbc_url' href='http://localhost:8080/BirtViewer/extract?__report=test1.rptdesign&__extractformat=XML'>http://localhost:8080/BirtViewer/extract?__report=test1.rptdesign&__extractformat=XML</a><br />
<br />
Gives me the following error:<br />
<br />
+ Data extract format is invalid or not specified.<br />
<br />
What am I doing wrong?<br />
<br />
Thanks in advance,<br />
<br />
Ken