Installing ColdFusion MX7 on RH EL 4 under root, everything seems to go ok during the install, except this possible problem:
Warning: C++ compatibility pack
The installer was unable to determine if the C++ compatibility pack is
installed by running the following command: rpm --query compat-libstdc++
If this machine uses a version of glibc that is 2.2.5.x or higher the
compatibility pack is necessary for C++ custom tags, Verity, and web server
connectors to work properly.

But I found some material that said this is a false indication on RH EL 4 and I should just ignor it. So I have installed now a few times - but when I finish the install, start the CF Server, and re-start Apache, I get an Apache error when it reads a line installed in the Apache config file by CFMX7 as follows:
httpd failed. The error was: Stopping httpd: [ OK ]
Starting httpd: Syntax error on line 907 of /etc/httpd/conf/httpd.conf:
Cannot load /opt/cf7/runtime/lib/wsconfig/1/mod_jrun20.so into server: /opt/cf7/runtime/lib/wsconfig/1/mod_jrun20.so: failed to map segment from shared object: Permission denied

So . . . . . like I said, I am logged in as root, I used the default runtime user (nobody) and the permissions on that account seem normal, so I am at a loss as to why I don't have permission to run this object - does the runtime user have to be the same for the Apache server?

Does RHEL4 support SELinux? If it does, temporarily turn it off (add 'selinux=0' to the kernel line in grub).

Or run 'setenforce 0', before you start apache (/etc/init.d/httpd start)

If that fixes it then investigate on what the proper security policy/context changes in selinux are required to allow for that module to load.

HA! - so yeah, I went back to RH EL 3 and it installed fine anyway, I finally got a chance to re-install with Rh ELv4 and yeah, it turned out to be SELinux. Thanx for the help. Now I just need to figure out how to configure SELinux. ;-)