JAXWS 2.0 error

sial
22 de Junio del 2006
C:tomcat5jaxwssamplesannotations>ant run
Buildfile: build.xml

run:
[java] Exception in thread "main" java.lang.NoClassDefFoundError: com/sun/o
rg/apache/xml/internal/resolver/CatalogManager
[java] at com.sun.xml.ws.util.xml.XmlUtil.createDefaultCatalogResolver(
XmlUtil.java:206)
[java] at com.sun.xml.ws.client.WSServiceDelegate.<init>(WSServiceDeleg
ate.java:117)
[java] at com.sun.xml.ws.spi.ProviderImpl.createServiceDelegate(Provide
rImpl.java:50)
[java] at javax.xml.ws.Service.<init>(Service.java:58)
[java] at annotations.client.AddNumbersImplService.<init>(AddNumbersImp
lService.java:44)
[java] at annotations.client.AddNumbersClient.main(Unknown Source)
[java] Java Result: 1

BUILD SUCCESSFUL
Total time: 1 second

una vez que corrí el ant server y el ant client, me manda el error del ant run, no entiendo que significa, alguien puede ayudarme porfavor.

Saludos y gracias de antemano.