Oracle XML Developers Kit 10.2.0.2.0 - Production

XML-25011: Error processing XSLT stylesheet: ../xsl/doyxslrahmen.xsl
file:////home/doyma/tomcat/webapps/doyweb_at/xsl/doyxslrahmen.xsl: XML-22021: (Error) Error parsing external document: 'http://www.doyma.at:80/contentxml/?newsid=&searchString='.