Exchange / OWA 2007 - Default BCC Field

I am trying to have the BBC field display as a default for all OWA 2007 users when they created a new message.  When a user clicks NEW they see the To... and Cc... fields but not the Bcc... field.  I know you can click on the Options... button and check off "Show Bcc" but this only displays the field for that initial message.  I need it on / displayed all the time.  Originally I go this working by editting the file (editmessage.aspx)on our CAS server and adding the below code.  But then we upgraded to Exchange SP2 and the file was changed back to the original.  Then I re-added the code to the (editmessage.aspx) file and now the Bcc... field DOES NOT display as before.  It is as if the code has no effect.  Did something change in SP2?  Is there additioinal code that can be added to make this work?

tr id="trBcc">
<td class="tdABB">
<a id="btnBcc" class="flat btn <%=UserContext.IsRtl ? "r" : "l"%>"
<%RenderOnClick("shwABM(\"divBcc\");");%> hidefocus="true" tabindex="-1" href="#">
<img align=absmiddle src="<
%UserContext.RenderThemeFileUrl(Response.Output, ThemeFileId.AddressBook);%>"> <%=LocalizedStrings.GetHtmlEncoded(Strings.IDs.BccEllipsis)%>
</a>
</td>
<td>
<% RecipientWell.Render(Response.Output, UserContext, RecipientWellType.Bcc); %>
</td>
</tr>