Export gridview to PDF generating statuscode 500 error(internal server error) in live but working fine in local

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C#

ASP.NET

When im Exporting img,Textboxvalues,Gridview to PDF generating statuscode 500 Error the Following is the code that i've written to generate the pdf. It's working fine locally or at server side also.. but When it hosted in live.. the problem araised.. Generating statuscode 500 Error during Onclick of PDFConversion Button.. How can i resolve such a live issue..

#region 
                using (StringWriter sw = new StringWriter())
                {
                    using (HtmlTextWriter hw = new HtmlTextWriter(sw))
                    {
                        //To Export all pages
                        grdaccinfodatewise.AllowPaging = false;
                        //Calling the Function BindGrid(), here im adding the data to the Datasource and diplaying in Grid
                        BindGrid();
                        
                        grdaccinfodatewise.RenderControl(hw);
                        StringReader sr = new StringReader(sw.ToString());
                        Document pdfDoc = new Document(PageSize.A3, 10f, 10f, 10f, 10f);
                        HTMLWorker htmlparser = new HTMLWorker(pdfDoc);
                        PdfWriter.GetInstance(pdfDoc, Response.OutputStream);
                        pdfDoc.Open();
                        pdfDoc.NewPage();
                        string imageURL = Server.MapPath(".") + "/img/bank_logo.png";
                        iTextSharp.text.Image jpg = iTextSharp.text.Image.GetInstance(imageURL);                       
                        jpg.SpacingBefore = 10f;                       
                        jpg.SpacingAfter = 1f;
                        jpg.Alignment = Element.ALIGN_CENTER;
                        pdfDoc.Add(jpg);
                        if (rdbtnbydate.Checked == true)
                        {

                            pdfDoc.Add(new Phrase("\r\nAccount Statement From " + this.dateMinFilter.Text.Trim() + " To " + this.dateMaxFilter.Text.Trim() + "\r\n\r\n"));
                            pdfDoc.Add(new Phrase("ACCOUNT NUMBER : " + Session["loginaccno"].ToString().Trim()));
                            pdfDoc.Add(new Phrase("\r\nCUSTOMER NAME : " + Session["CustName"].ToString().ToUpper().Trim()));
                            pdfDoc.Add(new Phrase("\r\nAccount Type : " + ViewState["SchemeName"].ToString().ToUpper().Trim()));                            
                        }
                        if (rdbtnmonth.Checked == true)
                        {

                            pdfDoc.Add(new Phrase("\r\nAccount Statement for the Month of : " + this.ddlmonth.SelectedItem.ToString().ToUpper().Trim() + " - " + this.txtyear.Text.Trim() + "\r\n"));
                            pdfDoc.Add(new Phrase("\r\nCUSTOMER NAME : " + Session["CustName"].ToString().ToUpper().Trim()));
                            pdfDoc.Add(new Phrase("\r\nACCOUNT NUMBER : " + Session["loginaccno"].ToString().Trim() + "\r\n\r\n"));
                        }

                        htmlparser.Parse(sr);
                        pdfDoc.Close();
                        Response.ContentType = "application/pdf";
                        Response.AddHeader("content-disposition", "attachment;filename=pdfExport.pdf");
                        Response.Cache.SetCacheability(HttpCacheability.NoCache);
                        Response.Write(pdfDoc);                        
                        HttpContext.Current.ApplicationInstance.CompleteRequest();
                    }
                }         
            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {

            }
#endregion