Hi
You can't store an image in outlook, you need to host one of the image somewhere else. First put the image in a url which is publicaly available and use the complete url instead of the name of the file only (with the name of the file only it will only work on your computer)
Then I would put more something like that for the image:
<img src="<url of the file>" border="0" style="width:600pt;height:14pt;">