mapping managed servers in a cluster_forms

Dear all,

In an use case, we have 4 Oracle Forms managed servers in a cluster_forms (11gR2). We need to assign 2 managed server to application A and 2 managed server to application B. The URLs are for example:

URL/forms/frmservlet?config=A
URL/forms/frmservlet?config=B

We mapped URLs to correct managed server and portsin forms.conf. e.g.:
<Location /forms/frmservlet?config=A>
       SetHandler weblogic-handler
       WebLogicCluster host_1:portA,host_2:portA
        DynamicServerList OFF
</Location>

<Location /forms/frmservlet?config=B>
       SetHandler weblogic-handler
       WebLogicCluster host_1:portB,host_2:portB
        DynamicServerList OFF
</Location>
But application connected only to first Location and URL. What is wrong? Is it better modify httpd.conf with Vitualhost?