row count in XML table

I am facing issue setting row count. I am using AW.XML table, and the xml is retrieved as a String object from a JSP. I have to explicitly set the column count and row count for the data to show in the grid. I know the column count that needs to be displayed, but the row count depends on the xml data.

data <- from JSP 
var obj = new AW.UI.Grid; 
obj.setHeaderText(myHeaders); 

//create ActiveWidgets data model - XML-based table 
var table = new AW.XML.Table; 
table.setXML(data); 
obj.setCellModel(table); 
obj.setColumnCount(4); 

//it wont work with out the row count 
//obj.setRowCount(1000); <------ issue

Is there a way that i can get the row count from the table after setting the xml to it? I've tried obj.getRowCount(); with no luck.

Thank you for helping.
Raj

Thanks. This fixes the problem.