Question About WebBrowser

I have a HTTP Web Server running on my local PC.

xxx.xxx.xx.xx is the IP of my Web Server

If I use I.E. and type in the address bar: http://xxx.xxx.xx.xx/mypicture.gif I will get the picture from my Web Server and it is placed in I.E.'s window.

If I use the WebBrowser like this: WebBrowser1.Navigate "http://xxx.xx.xx.xx" it will connect to my WebServer and the picture is displayed in the WB's window.

If I use the WebBrowser like this: "<img src='http://www.mywebsite.com/mypicture.gif'>" it will connect to my web site and download the picture and place it in WB's window.

If I use the WebBrowser like this: "<img src='http://xxx.xxx.xx.xx/mypicture.gif'>" it does not connect to my WebServer. Why?