DatabaseImpl error on DBConnection

Hello,

I'm using the current trunk of Xindice because I need to work with Java 1.5.
This piece of code (from addressbook example) give me problems:

public class DBConnection extends HttpServlet {
>
>  // Collection manager path to instantiate
>  public static final String XINDICEURI="xindice://localhost:8080/db/";
>  public static final String COLLECTIONURI="xmldb:" + XINDICEURI;
>  String colstring = COLLECTIONURI + "Folder5";
>


 protected static DBConnection connection = new DBConnection();
>
protected static Database db = null;
> protected static Collection collection = null;
>
> public Collection getCollectionInstance (HttpServletRequest request,
> HttpServletResponse response ) throws javax.servlet.ServletException,
> java.io.IOException {
>
>       try {
>          if ( db == null ) {
>
>             // Register the dbxml database handler
>             db = (Database)Class.forName("
> org.apache.xindice.client.xmldb.DatabaseImpl").newInstance();
>             DatabaseManager.registerDatabase(db);
>             // Get a collection instance
>             collection = DatabaseManager.getCollection( colstring );
>          }
>

The error message returned is "org.apache.xindice.client.xmldb.DatabaseImpl".
When I was working with Java 1.4 I did not have this error. Is it working
with current trunk of Xindice related? or am I forbidden something?

I tried passing 'user' and 'password' parameters to the 'getCollection'
function, but this is not the problem. I can not found it.

Thanks for your help

Iñaki