ormi request loadbalancing

we are load balancing Oracle Transport manager (OTM) application. Here Web & App both are running on the same server. And F5 load balances the Web properly. But we are facing the problem for App load balancing. When request comes to web it calls the application (App) with the ORMI://ipaddress:23791 URL. here we have configured seperate VIP for WEB & APP, but on this APP VIP we didnt get any connections and Application is not work. So Please suggest on this