Passing Username from Login for Personalized Pages

I am using the following code within my login process page. The code works correctly in loging in a user but does not work caring the entered #Username# to the site. I do not think I am using (self.location="/secureindex.cfm?Username=#Username#";) correctly. Any suggestions...on my recieving page I have a query using the passed #Username# to load the persons first and last name into a welcome message. I will also be using the Username to record any edits the user makes to the site.

What am I doing wrong? My full code is....

<cfquery name="qVerify" datasource="MyDatasource">
    SELECT             Username, Password
    FROM                Clienttable
    WHERE              UserName = '#Username#'
                     AND Password = '#Password#'
</cfquery>

<cfif qVerify.RecordCount>
    <cfset session.allowin = "True">
    <cfset session.Username = qVerify.Username>
    <script>
         self.location="/secureindex.cfm?Username=#Username#";
    </script>
< cfelse>
    <script>
        alert("My Alert");
        self.location="Javascript:history.go(-1)";
    </script>
</cfif>

Thanks so much!!