DASL bad request?

[Eirikur Hrafnsson]

Any idea why this DASL property search fails? A content search works 
with the same "path" and "scope" :D

        String path = "/content";
        String query =
            "<D:searchrequest xmlns:D =\"DAV:\">" +
                "<D:basicsearch>" +
                    "<D:select>" +
                        "<D:prop>" +
                            "<D:getcontentlength/>" +
                        "</D:prop>" +
                    "</D:select>" +
                    "<D:from>" +
                        "<D:scope>" +
                            "<D:href>files</D:href>" +
                            "<D:depth>infinity</D:depth>" +
                        "</D:scope>" +
                    "</D:from>" +
                    "<D:where>" +       
                    "<S:property-contains>" +
                                  "<D:prop><u:Author/></D:prop>" +
                                  "<D:literal>Laufey</D:literal>" +
                                "</S:property-contains>" +
                    "</D:where>" +
                "</D:basicsearch>" +
            "</D:searchrequest>";
        SearchMethod method = new SearchMethod(path, query);
The servlet gives the error:
http8090-Processor18, 10-Jan-2005 16:58:15, Administrator, SEARCH, 207 
"Multi-Status", 2340 ms, /
http8090-Processor14, 10-Jan-2005 16:59:11, Administrator, SEARCH, 400 
"Bad Request", 35 ms, /

Cheers
Eirikur, Idega.