Proxy Problem

[Muhammad Nadeem]

Hi everybody,,
I have configured a proxy server with 'type=client-port-balance'. I
have configure two backed FR servers(192.168.0.109 and 192.168.0.112).
I am sending requests from a PC  to 192.168.0.102 ( acting as proxy
server). But requests are forwarded to only one FR server (i-e
192.168.0.112).
Why proxy server is not sending requests to other one. As each request
has same IP but different PORT, So hashing mechanism of Proxy server
should also choose other FR server (192.168.0.109) for requests
entertaining.
could anyone please tell me what's the issue. Thanks