I may have had the same problem. I need some more information first.
Is index.html in your htdocs dir? check!
Check your error_log file first. You might see some segmentation faults there. If that is the case, wich mod_* modules have you compiled with apache? If you are running apache with mod_perl and you have segmentation faults, than you probebly have the same problem as I had.
So, first check your error_log and access_log files, and tell us how you have compiled apache.