returned pojo attribute is null

[G.Long]

Hello :)

I've got a webservice which is correctly running. One of its method 
return a DataHandler which contains an EObject.

I wanted that method to also return a string attribute. So I created a 
pojo class which would contain the DataHandler and the String.

I updated the interface of the webservice and generated the 
implementation class, the wsdl and the wrappers.

The problem is that when I test the webservice, on server side the 
DataHandler and the String are correctly set but when I get the result 
on client side, the DataHandler attribute of my container class is null.

Here is my pojo container class:

public class ServerLibraryResult {

    private DataHandler data;
    private String path;

    public DataHandler getResult() {
        return this.data;
    }

    public void setDataHandler(DataHandler data) {
        this.data = data;
    }

    public String getPath() {
        return this.path;
    }

    public void setPath(String path) {
        this.path = path;
    }

    public ServerLibraryResult(){

    }
}

Thanks for your help :)
Regards.