PingPong Example for the LWIP

Hello, i am still new to the Genode so maybe you will find that my question is silly but i tried to run the PingPong example but i failed i build the Genode for base_linux i enabled the libport repository fron the build.conf then i prepare for the PKG=Lwip from the build directory i tried to run the server as next make run/test-ping_server and it is run successfully. when i try to do that for the client i could not success i hope some one can help .. i am sure i need to change in some values but actually i couldn't know where .