Hi Mohammed,
the parameter you have used is correct. In addition you can modify it as below
icm/server_port_0 = PROT=HTTP,PORT=your port,TIMEOUT=30,PROCTIMEOUT=600
if you still face the session timeout after setting up the above parameter. Then please past the screenshot of the session timeout and also i request you to generate the HTTP watch trace and find the application for which the timeout is happening.
Regards,
Pavan Gunda