Websphere Portal and webmaster access error

Dear all   I had Virtual Server 172.16.80.72 with pool 3 APP Webshpere 172.16.85.71:10039,172.16.85.72:10050, 172.16.85.73:10050. VS's irule redirect from http://172.16.80.72 to http://172.16.80.7...