[Zope] No management interface on port 80

I had my zope site up and running smoothly in test environment, without a glitch on port 8080 for about 2 weeks. I am using ZServer directly. Now I decided to make it live, on the default port 80. I installed Zope as root, with the command: zope_dir/install -u nobody Then I modified the start script and added -w 80 after z2.py and took out the -D flag. The problem I am facing now is that whenever I click to go to the management screen, I do not get any response back from the server. Any suggestion will be greatly appreciately. Thank you, -- sudhir