FastCGI request not getting served is one of the common problems.
While starting the Web Server, did you see the following message?
FCGI1000: Sun Java System Web Server 7.0 FastCGI NSAPI Plugin <build-information>
Yes — FastCGI Plug-in has been loaded successfully.
No — Check the path to the plug-in library within magnus.conf file.
Check if the request mapping is correctly specified within obj.conf file. For more information, see Administrator's Configuration File Reference Guide.
Check the Server Log for any error message.
Check the permissions for the stub binary and FastCGI applications. Without sufficient permissions, the plug-in will fail to start the stub/application.
Check the Fastcgistub.log file for any possible error on the stub side.
Try executing the FastCGI application in a standalone mode and check if the application runs normally.