port forwarding is done to allow incoming connections to a particular local host ip, you have done the port forwarding on the wrong router.
if you want to make a connection from R1_IPAddr_localIP1 to R2_IPAddr_localIP1 on port 5000 . then R2 should be configured for port forwarding (to R2_IPAddr_localIP1:5000)
in order to check whether the port is forwarded properly on R2 to R2_IPAddr_localIP1 , you can try to access the following website from a computer connected to R2
**broken link removed**
enter 5000 and click check
you should get port open message, provided the port is open on R2_IPAddr_localIP1, by creating a socket binds.