BookMark with Expand/Collapse using Winnovative HTML to pdf conveter

Hello Every,

I am converting a html to pdf using winnovative. I am able to generate pdf with  bookmark but not in  Expand/Collapse manner.I want to create pdf in Expand/Collapse Manner.Below  is what i am doing to create a pdf using winnovative.


     pdfconverter.PdfBookmarkOptions.AllowDefaultTitle = True
     pdfconverter.PdfBookmarkOptions.TagNames = New String() {"TD"}
     pdfconverter.PdfBookmarkOptions.ClassNameFilter = "ACTIVITY"


And my HTML is like follow.

<TABLE>

<TR>
<TD  class="ACTIVITY" style="vertical-align:middle; text-align: center; font-size:small; font-weight:bold;"> CHAPTER 1
<TD  class="ACTIVITY" style="vertical-align:middle; text-align: center; font-size:small; font-weight:bold;"> CHAPTER 1.1

</TD>
</TR>
<TABLE>



By using above code i am able to generate a pdf with bookmark but note in Expand/Collapse Manner.

Any solution for creating a pdf in Expand/Collapse manner.

Thanks in advance