Are you sure - Apache is always on or you just think that it is on?
I have similar problem with OS X 10.6.
For test I have used simple web page on Apache and find out that there was a problem with Apache.
Fix Apache and there is no more problem with FM 10 Server Advanced installation.
Search around for that error. Me remember some long threads about it here and at other places. No resolutions if I can recall. Eventually most people who get that error just get tire and do a clean reinstall.
I have sent you a private message (top of this page - right side - envelope icon just beneath the blue horizontal bar).