Help needed.. Grid is not loading Data..

Hi ,
I am new to DhtmlGrid, I was trying load a grid by connecting to postgres sql server.
But grid is not getting populated and its not even throwing any error.When I invoke my Connector servlet its generating xml, but somehow its not getting loaded in grid, Please help me here…

Please find my code below:

index.html

SLPMS. Customer Manager /*these styles allow dhtmlxLayout to work in fullscreen mode in different browsers correctly*/ html, body { width: 100%; height: 100%; margin: 0px; overflow: hidden; background-color:white; }
<script type="text/javascript">
var layout,menu,toolbar,contactsGrid,contactForm;
dhtmlx.image_path = "codebase/imgs/";
dhtmlxEvent(window,"load",function(){
	layout = new dhtmlXLayoutObject(document.body,"2U");
    layout.cells("a").setText("Customers");
    layout.cells("b").setText(" Add Customer");
    layout.cells("a").setWidth(700);
    toolbar = layout.attachToolbar();
    toolbar.setIconsPath("icons/");
    toolbar.loadXML("codebase/xml/toolbar.xml");
    
    contactsGrid = layout.cells("a").attachGrid();
    //contactGrid.setImagePath("./codebase/imgs/");
    //contactGrid.setSkin("dhx_skyblue");
	contactsGrid.setHeader("Name,Address,Phone Number,Email,Reference,Date Of First Contact,Special Arrangements,Test Report Format Type");
	contactsGrid.setInitWidths("*,*,*,*,*,*,*,*");
	contactsGrid.setColAlign("left,left,left,left,left,left,left,left");
    contactsGrid.setColTypes("ro,ro,ro,ro,ro,ro,ro,ro,ro");
    //contactsGrid.setColSorting("str,str,str");
     contactsGrid.init();
     myGrid.load("/testGrid");
     
    
})
</script>

import java.sql.Connection;
import java.sql.DriverManager;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.dhtmlx.connector.DBType;
import com.dhtmlx.connector.GridConnector;
import com.dhtmlx.connector.ThreadSafeConnectorServlet;

public class SaalsConnectorServlet extends ThreadSafeConnectorServlet{
@Override
protected void configure(HttpServletRequest req, HttpServletResponse res) {
//obtain DB connection
Connection conn=null;
try {
Class.forName (“org.postgresql.Driver”).newInstance ();
conn = DriverManager.getConnection(“jdbc:postgresql://localhost:5432/SLPMS”, “postgres”, “admin”);
System.out.println(“Con:”+conn);
} catch (Throwable e) {
e.printStackTrace();
}

        //Initialize connector
GridConnector c = new GridConnector(conn,DBType.PostgreSQL);
        c.servlet(req, res);
        //configure used table and fields
       
c.render_table("customer", "customerid", "name,address,phonenumber,email,reference,dateoffirstcontact,specialarrangements");

}
}

testGrid /testGrid