java service with get/set methods will fail with ""illegal object given!"

Hi,

i have a java service which is called from basic macro as seen below.
it works with aoo415, but will fail with lo 5.4.7.2:

module org {
        module test {
                interface XMeta {
                        interface com::sun::star::lang::XServiceInfo;
                        boolean initialize([in] com::sun::star::lang::XComponent xComponent);

                        // getter() without parameter will fail
                        string getName();                                       // not working
                        // setter() returning void will fail
                        void setName([in] string sAutor);               // not working

                        string getVersion();                            // not working
                        boolean setVersion([in] string sVersion);       // works
        };
};

module org {
        module test {
                service Meta : XMeta;
        };
};

calling from basic:

oHandler = CreateUnoService("org.test.Meta")
oHandler.initialize(ThisComponent)

' will fail with a RuntimeExecption: "illegal object given!"
' [jni_uno bridge error] UNO calling Java method queryInterface: java.lang.NoSuchMethodError: 
getName
' java stack trace: java.lang.NoSuchMethodError: getName

it seem's the get/set Methods are automatically mapped to properties?

any hints what could be wrong?

Regards
Oliver