Error: Protocol Not Valid for HTTP. Might Be Because Port Number Is Out of Range.

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I am getting the following error:

"The protocol binding '192.168.100.110:80:' is not valid for 'http'.
This might be because the port number is out of range."

I have checked network solutions and my router and my server and
everything looks the same.
In my router, I had the TCP protocol selected. I have changed to
"both" to no avail. I have also
tried pointingto 8080.

I have never seen this before. I get the error when I try to point to
a new WCF web service that
is running below a subdomain.

Any ideas?

Thanks.
.