wsdl array of objects

I wrote wsdl file, then modified skeleton and tried to test. Something wrong with array of songs objects.

     <xsd:complexType name="ArrayOfSongs">
       <xsd:sequence>
         <xsd:element maxOccurs="unbounded" name="item" type="tns:song"/>
       </xsd:sequence>
     </xsd:complexType>

    <xsd:complexType name="song">
      <xsd:all>
        <xsd:element name="name" type="xsd:string"/>
        <xsd:element name="artist" type="xsd:string"/>
        <xsd:element name="album" type="xsd:string"/>
        <xsd:element name="duration" type="xsd:int"/>
      </xsd:all>
    </xsd:complexType>

When I'm testing my service on netbeans I get unknown exception. Maybe I defined wrong complexType? I've created ArrayOfStrings, everything works fine, so what is wrong with ArrayOfSongs. Any information of creating arrays of obje开发者_Go百科cts would be helpful.

This service bind on SOAP, I used axis2, ant, tomcat server.

Thanks!