Iicorrect URL resolution

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Installed c5 latest on a test machine (vista + XAMPP 1.70) on my home net. On that box, it runs fine as localhost. From my laptop (XP), when I attempt to hit the server with either the NETBIOS name or IP address, URL switches to localhost. This, of courses is directed at the laptop and an error page is the result.

Now, the reason I am posting here; This version of Apache/MySQL/PHP on XAMPP is also hosting to other sites which resolve to the Machine name without swapping to "localhost."

Where in c5 might I look for some setting that might be causing this? or failing that, any other ideas?

Bob