Couple of Questions

I just recently installed OPManager but I'm having trouble getting it to launch.
I'm getting the error "Failed to establish connection with web server. Gracefully shutting down OpManager." I did some digging around on the support site and found an article saying to chmod the httpd file and modify the httpd.conf file, but after doing that I'm still coming up empty.

I'm running Fedora Core 5. I already have an apache & mysql server running on that box, could this be the problem? If so how would I go about getting OPManager to talk to my existing apache server instead of starting its own, and using my already existing mysql database?

Thanks in advanced,
Garret