Problems when using Data Service

pooh

Hi,<br />
<br />
I am trying to use DataService to excess data from my table. Table Name is "mytable"<br />
<br />
When I try to use rs.getColumnNames() in displayData function, it hangs there.<br />
<br />
<br />
Here is the portion of my code : <br />
<br />
<pre class='_prettyXprint _lang-auto _linenums:0'>

function dataServiceInit()
{
alert("dataServiceInit");
actuate.load("viewer");
actuate.initialize( "http://localhost:8900/iportal/", null, null, "", createDataService );
}

function displayData(rs)
{
alert("displayData");
var columns = rs.getColumnNames();

alert(columns.length);
while (rs.next()){
for (var i = 0; i < columns.length; i++){
window.alert(rs.getValue(columns[i]));
}
}
}

callBackError=function(exception){ window.alert('ERROR: ' + exception); };

function createDataService()
{
alert("createDataService");
dataService = new actuate.DataService("http://localhost:8900/iportal/" );
var request = new actuate.data.Request( "mytable" );
request.setStartRow( 1 );
request.setMaxRows( 50 );

dataService.downloadResultSet( "/Home/administrator/ci_reports/table.report.rptdesign", request, displayData(request) );
}
</pre>