Error while Installing Octops

I am installing Octopus on a new server.
After the Dialog “Web Portal”, when choosing “Create Site”, I get the warning:
"Port 80 appears to be in use by another web site. If you continue, you will need to stop the existing site before Octopus can run. Continue?
I stop the default web site that used port 80.
Then I click Yes in the warning dialog.
Now I get the error message:
Error: Filename:
Error: Unrecognized configuration path

What do I need to do to fix this problem?

Thank you

Never mind. I was able to solve it.