[users@httpd] Apache 2.2.4 does not start - no errors

[Jain, Abhay K, INFOT]

We are running on Tru64 Unix. Downloaded 2.2.4, and installed.
Just tried vanilla version and changed only the user/group and
ServerName in httpd.conf. When we start as
/usr/apache/bin/apachectl start, it just exists without
generating any error. Exit code form script is 0 and no
httpd process is running. What may be going on?
Thanks.