Apex 2.2 - Admin logon screen cannot be displayed

I have installed Application Express 2.2 into an Oracle 9.2.0.8 database running on a LINUX X86 server but even after following all the relevant documentation for the installation and configuration I am still unable to access the 'apex admin' logon screen. I can find nothing of use in any of the log files as to why this is failing. I can connect OK to the database via SQL*Plus as the APEX_PUBLIC_USER so I know the password is correct.
Also, if I enter the URL http://host:7777/ this displays the HTTP Server Home Page, from where I can follow the various links.
If I enter the URL http://host:7777/pls/apex/admin_/ the Gateway Config Menu is displayed and I can see the APEX configuration.
However, when I enter the URL http:/host:7777/pls/apex/apex_admin/ I just get 'The page cannot be displayed'
I at a loss to think what I've missed in this configuration?
I have done a similar install before i.e. Apex 2.2 into a 9.2.0.8 database but on a Windows 2003 server and this all works OK.
Anyone with a similar experience I would value your input before I loose what remains of my hair.
Regards
Neil

Sunny, Thanks for the input.
I have already tried the steps you've described without any success. It would appear that the access.log and error.log files are created when the HTTP server is started. However, when I did this and tried the URL nothing was written into either of these logs.
I don't have a marvel.conf but I have defined the "apex" dad. This is defined in file $ORACLE_HOME/Apache/modplsql/cfg/wdbsrv.app
I don't have a marvel.conf file either on my Windows server, but Application Express is running OK on this system.
I have spent many hours comparing the setup of the two servers and have not found any significant differences to explain why one works and the other does not.
Regards
Neil

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[https://cw.sdn.sap.com/cw/docs/DOC-101074]
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hi guys
pls tel me
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thanks
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