ASP.NET

I have a website that uses the Microsoft Report Viewer to display a report and it worked great until I uploaded it to web hosting company. It runs great on my local machine but not on the web host server.

protected void dtlGradeMaster_ItemDataBound(object sender, DataListItemEventArgs e)
{
  GridView grdGradeDetails = (GridView)e.Item.FindControl("grdGradeDetails");
  BindDetailGrid(grdGradeDetails, dtlGradeMaster.DataKeys[e.Item.ItemIndex].ToStrin());
}

private void BindDetailGrid(GridView GridView, string strGrade)
{
    DataTable GridData = GridDataSource(strGrade);
    GridView.DataSource = GridData;
    GridView.DataBind();
}