rownumber issue

[manojvijayan]

i have created the grid with EXTJS 4.0.7 .I update the grid dynamically using reconfigure function

store.proxy.url='json_data.php';
store.proxy.extraParams={task:'list'};
store.model.prototype.fields.addAll(fields);
                                        
salesorder_grid.reconfigure(store, columns);
Ext.getCmp('pagingtoolbar').store =store;    

store.proxy.reader.totalProperty=gridTotal;
store.totalCount =gridTotal;
store.loadData(gridData);                                        
Ext.getCmp('pagingtoolbar').onLoad();

The above code works very well.

But the row number of grid is not changed.When i goes to second page,the row number starts from 1

How can i fix it.