The property or field has not been initialized.

[bhavnvyas]

Hi I am getting this error when I am trying to call sharepoint 2010 client object model in my silverlight application.**Error:The property or field has not been initialized. It has not been requested or the request has not been executed. It may need to be explicitly requested.
**using (SP.ClientContext objSite = new SP.ClientContext("http://Sharepoint:80/"))
{

            SP.CamlQuery objCaml = new SP.CamlQuery();
            objCaml.ViewXml = @"";
            SP.Web objWeb = objSite.Web;
            SP.List list = objWeb.Lists.GetByTitle("BackgroundImages");
            listItems = list.GetItems(objCaml);
            objSite.Load(objWeb);
            objSite.Load(list);
            objSite.Load(listItems);
            objSite.ExecuteQueryAsync(Succeeded, Failed);
        }

Please help****