problem in converting html to pdf

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ASP.NET

Dear All

I am using below code for converting html to pdf
below code running fine on one form but same is not running on another form
in "strhtml" i am passing my html text..
Even i hard code some html string then also it is not going anything fine
please help....

Dim cliid As String = Request("fromaccid")
Dim doc As New Document()
Dim UrlDirectory As [String] = Request.Url.GetLeftPart(UriPartial.Path)
UrlDirectory = UrlDirectory.Substring(0, UrlDirectory.LastIndexOf("/") + 1)
Response.Write(UrlDirectory)
Dim getcurrtime As String() = Split(DateTime.Now.TimeOfDay.ToString, ".")
Dim dt As String = ClsDate.GetFormatedDate(ClsApplvl.Getserverdt(), "DD/MM/YYYY")
PdfWriter.GetInstance(doc, New FileStream(Server.MapPath("../TRANSACTIONPDF/" & cliid & " " & dt & ".pdf"), FileMode.Create))
'iTextSharp.text.html.simpleparser.StyleSheet.
doc.Open()
Dim htmlText As [String] = strhtml

Dim htmlarraylist As List(Of IElement) = iTextSharp.text.html.simpleparser.HTMLWorker.ParseToList(New StringReader(htmlText), Nothing)
Dim font As iTextSharp.text.Font = FontFactory.GetFont("Times-Roman", 10, 1, iTextSharp.text.BaseColor.GRAY)



For k As Integer = 0 To htmlarraylist.Count - 1
  Dim x As IElement = DirectCast(htmlarraylist(k), IElement)
  Response.Write(x.Type.ToString() + "#<br>")
Next

Dim mypara = New Paragraph()
mypara.InsertRange(0, htmlarraylist)
mypara.Font = font
doc.Add(mypara)
doc.Close()</br>