Netweaver 7.0s "Cannot reach external Application Server on localhost:50000

Question

i entered SOAMANAGER(T-CODE) at SAP-GUI.
only thing i set for this is "J2EE Server Access Information"
at System Global Settings in soamanager web page.
Hostname and Portnumber is entered normally.
and
when i click [Open Web Service navigator for selected binding]
at  Business Administration tap
to test a simple web servcie that i made in SAP-GUI(it's made very simply by wizard.).
"503 Service not available" page popup.
the others link in soamanager page is operating normally.
but only [Open Web Service navigator for selected binding] has
the problem.
plz help me.
i'm very new to SAP system.
how i can do at this time?
error detaile :
503 Service not available
Error: -6
Version: 7000
Component: J2EE Server
Date/Time: Mon Mar 24 12:59:03 2008 
Module: http_j2ee_mt.c
Line: 820
Server: v440-a_SSD_00
Error Tag:
Detail: Cannot reach external Application Server on localhost:50000
thx in advance.

Answer 1

IMHO, there is no J2EE server on localhost and/or you are routing your localhost-request over a proxy server in which case the proxy-server can of course not resolve localhost.
just enter the FQDN(fully qualify domain name) of a server actually running a J2EE server instance as well as your required application (web server navigator).
anton