Hi, Could you please try to access Guvnor through WebDav using the methods described by the doc: http://docs.jboss.org/drools/release/5.3.0.Final/drools-guvnor-docs/html/ch09.html#d0e2774?
If this works, then its probably a bug or a configuration problem in your ant webdav plugin.
Cheers,
Jervis