Resolving types in imported schema

Hi,

When I try to compile the following schema definition (which is part of a WSDL...):

<wsdl:definitions targetNamespace="

http://mydomain.com/testservice
"
                  xmlns:impl="http://mydomain.com/testservice"
                  xmlns:wsdlsoap="
http://schemas.xmlsoap.org/wsdl/soap/
"
                  xmlns:apachesoap="http://xml.apache.org/xml-soap"
                  xmlns:soapenc="

http://schemas.xmlsoap.org/soap/encoding/"
                  xmlns:xsd="http://www.w3.org/2001/XMLSchema
"
                  xmlns:wsdl="
http://schemas.xmlsoap.org/wsdl/">
    <wsdl:types>
        <schema targetNamespace="

http://mydomain.com/testservice" xmlns="
http://www.w3.org/2001/XMLSchema" xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/
"
>
            <import namespace="
http://schemas.xmlsoap.org/soap/encoding/"/>

            <complexType name="SOAPStruct">
                <sequence>
                    <element name="varInt" type="xsd:int"/>
                    <element name="varFloat" type="xsd:float"/>
                    <element name="varString" nillable="true" type="soapenc:string"/>


                </sequence>
            </complexType>

        </schema>

using the following code:

    public static SchemaTypeSystem compileSchema(Definition def) throws AppException {
        if (isDebug) LOG.debug("Compiling schema...");

        SchemaTypeSystem sts = null;

        Map nsDefs = def.getNamespaces();

        List schematas = ServiceUtils.getSchemata(def);

        if (schematas == null) {
            sts = null;
        } else {

            XmlObject [] xmloa = new XmlObject[schematas.size()];
            int i = 0;

            XmlOptions xmlopts = new XmlOptions();

            // For imported schematas
            xmlopts.setCompileDownloadUrls();

            xmlopts.setCompileNoUpaRule();

            // For NS prefixes defined in the WSDL element, and inherited into the schema element's scope.
            xmlopts.setLoadAdditionalNamespaces(nsDefs);

            //xmlopts.setCompileNoValidation();

            //xmlopts.setSaveImplicitNamespaces(nsDefs);
            //xmlopts.setSaveAggressiveNamespaces();
            //xmlopts.setSaveNamespacesFirst();


            Iterator it = schematas.iterator();
            while (it.hasNext()) {

                Schema si = (Schema) it.next();

                //addAdditionalNamespaces(si, nsDefs);

                try {
                    if (isDebug) LOG.debug("Parsing Schema: " + si.getDocumentBaseURI());

                    xmloa[i++] = XmlObject.Factory.parse(si.getElement(), xmlopts);
                } catch (XmlException e) {
                    throw new AppException("compileSchema: Error parsing schema: " + si.getDocumentBaseURI(), e);
                }

            }



            try {
                if (isDebug) LOG.debug("Compiling schemata...");

                sts = XmlBeans.compileXsd(xmloa,
                        XmlBeans.getBuiltinTypeSystem(),
                        xmlopts);

            } catch (XmlException xe) {
                throw new AppException("compileSchema: Error compiling schemata: ", xe);
            }

        }

        return sts;
    }


I get the following exception:

org.apache.xmlbeans.XmlException: error: src-resolve: type 'string@

http://schemas.xmlsoap.org/soap/encoding/' not found.


Can anyone tell me why? 

I did add setCompileDownloadUrls() (per 

http://www.mail-archive.com/search?l=user%40xmlbeans.apache.org&q=import+error+src-resolve
) and tried a bunch of other XmlOptions, but it still is unable to resolve soapenc:string 

Thanks in advance,
Anil.

P.S. 
1. (UPDATE) The SOAP encoding schema types do get resolved successfully if I add a schemaLocation to the import element.