using CFLOGOUT

I have logout link on the index.cfm and check IsDefined in Application.cfc

in OnRequestStart.

Should OnRequestStart running every time user click go to the form, for this case pass link index.cfm?Logout and CFLOGOUT trigger?

For some reason, when user click the link, it still running index.cfm and user still login.

any information help is great appreciated,

Regards,

Iccsi,

<p><a href="index.cfm?logout">log Out</a><p>

<cfif (IsDefined("Form.logout") )>

     <cflogout>

</cfif>