CFdocument for pdf not working when text has special char

How should I handle if text contain special characters in cfdocument for pdf? Wwhen text has "*" or "#". It pop a message says the file could not be open because either damaged or corrupted.

(using as email attachment or not properly decoded). 

This is ie 8 in window environment.

Here is the code:

         <cfset pdffile = "test.pdf">

         <CFHEADER NAME="Content-Disposition" VALUE="attachment; filename=#pdffile#">

        <CFCONTENT TYPE="application/pdf">

        <cfdocument

            encryption = "128-bit"

            format = "PDF"

            marginbottom = "1"

            marginleft = "1"

            marginright = "1"

            margintop = "1"

            orientation = "landscape"

            permissions = "AllowPrinting">

            <cfdocumentitem type="header">

            <h5 align="center">Text Header<BR></h5>

            </cfdocumentitem>

            <cfdocumentitem type="footer">

                <cfoutput>#DateFormat(now(),'yyyy-mm-dd')#</cfoutput>

            </h6>

            </cfdocumentitem>

            <cfinclude template="text.cfm">

         </cfdocument>

Thank for your help.