Clearing Session and/or App variables with Log-out Page?

Greetings

I have 3 distinct user types for my app- admins, appraisers and clients.

All have their own directories and each directory has it's own Application.cfm:

1) <cfapplication name="appraiseri"

applicationtimeout="#CreateTimeSpan(0,2,0,0)#"

clientmanagement="Yes"

sessionmanagement="Yes"

sessiontimeout="#CreateTimeSpan(0,2,0,0)#"

SetClientCookies="Yes">

2) <cfapplication name="appraiserview" ......

3) <cfapplication name="clientview" .......

Each have their own login which simply uses their ID in the DB as the session variable.

login_do.cfm:

1) Appraisers: <CFIF auth_direct_appraiser.RecordCount NEQ 0 >

<cfset Session.appraiser_user_id =auth_direct_appraiser.appraiser_ID>

<cfset Session.appraiser_fname =auth_direct_appraiser.appraiser_fname>

<cfset Session.appraiser_lname =auth_direct_appraiser.appraiser_lname>

2) Admins: <cfset Session.user_id =auth_direct.staff_ID> ......

3) Clients: <cfset Session.processor_user_id =auth_direct_processor.processor_ID>

I have had a session persisting for a week now- I have no idea how to get rid of it, and if one simply hits the "login" submit button with no UN or PW, it runs a query on a client (the same one) ?

My logout page is not working at all- if the code were correct, it would clear any session variable? I have not really set an app variable (except timeout) so no need to clear that?

Here is the code:

<CFLOCK SCOPE="Session" TYPE="Exclusive" TIMEOUT="60">

    <CFLOOP COLLECTION="#Session#" ITEM="Key">

        <CFIF NOT ListFindNoCase('IveSeenIT', Key)>

            <CFSET StructDelete(Session, Key)>

        </CFIF>

    </CFLOOP>

</CFLOCK>

<SCRIPT LANGUAGE="JavaScript">

    alert("You have been logged out from the XXXXX Intranet")

    location.href='login.cfm';

</SCRIPT>

Any help would be appreciated- this is leaving a huge security gap in the app right now.

Thanks