session variable undefined in MX 6.1, works in CF 5

http://wsprod.colostate.edu/cwis116/hscouns%5Forder/?clear=yes
This server has MX6.1 and session variable apppack is undefined.

The same code works on CF 5 server as in
http://admissionsinfo.colostate.edu/hscouns_order/?clear=yes

I have in the application.cfm file
<cfapplication name="Highschool Counselor Order" sessionmanagement="Yes" setclientcookies="Yes" sessiontimeout=#createtimespan(0,0,20,0)#>

And in contact.cfm have :-
<cfif form.submit EQ "Continue"><!--- Only get form vars from last page (ignore if backing up through prcess) --->
<cflock scope="SESSION" type="EXCLUSIVE" timeout="10">
<cfset session.sOrder = StructCopy(form)>
</cflock>
</cfif>
<cfdump var="#session.sOrder#">

In confirm.cfm session.sOrder.apppack is undefined ??

I am not using cflocation anywhere.

<!--- Main Resources Page --->

<!--- Clear session variables --->
<cfif isDefined('URL.clear') AND URL.clear EQ 'yes'>
<cfif isDefined('session.sOrder')>
<cfset junk = StructDelete(session,'sOrder')>
</cfif>
<cfif isDefined('session.sContact')>
<cfset junk = StructDelete(session,'sContact')>
</cfif>
</cfif>

<!--- If we stepped back from the contact form, save vars --->
<cfif isDefined('form.submit') AND FORM.SUBMIT eq "Back">
<cfset session.sContact = StructCopy(form)>
</cfif>

Index.cfm
<!--- Main Switch --->
<cfswitch expression="#hAct#">

<cfcase value="home">
<cfinclude template="dsp_main.cfm">
</cfcase>

<cfcase value="order_init">
<cfinclude template="dsp_contact.cfm">
</cfcase>

<cfcase value="order_2">
<cfif form.submit EQ 'Back'><!--- BACK --->
<cfinclude template="dsp_main.cfm">
<cfelse><!--- FORWARD --->
<cfinclude template="act_valid_contact.cfm">
<cfinclude template="dsp_confirm.cfm">
</cfif>
</cfcase>

</cfswitch>

Any suggestions? Thanks.