IIS, Orion, virtual host

[olivier]

Hi,

For some reason, I have set 2 IP addresse to my machine (NT). x.x.x.20 and
x.x.x.21. (modification in the connection setting and the hosts file)
I have configured IIs to use x.20, on port 80, and Orion x.21 on port 80.
Is is because the port are the same that I can't start both of them at the
same time (they complain that the address is in use).

Or is it possible and I don't know how to do it ???

Thanks,

olivier