Setting up PricePriceListService on an inbound port

I am trying to setup an inbound port to retrieve customer prices via the PricePriceListService Service operation over Http.

I have previously successfully setup a PricePriceDiscJounral service so attempted to copy the settings. The setup looks like this.

Image may be NSFW.
Clik here to view.

However when I try to activate the port I get the following error. The deployment website was not found for port:

Image may be NSFW.
Clik here to view.

Is this a setting issue within the Inbound ports, something else I've got to deploy to IIS, or something else.

Any help much appreciated