[img]https://mail.google.com/mail/?ui=2&ik=9e65189e48&view=att&th=137a3f02d5f6265c&attid=0.2&disp=inline&realattid=file2&safe=1&zw[/img]
...It looks like you're trying to link a Gmail attachment. That's not going to work, since nobody on these forums aside from yourself is logged into your Gmail account.
I use Flickr to host pics, and I know others on these forums use Photobucket. Either of these should work for you, though getting a URL from Flickr is a bit of a maze (you'll want to view all sizes of the image, then view the largest size, then right click it and select "Copy image location" (assuming Firefox) or select "Properties" and copy the image's URL (assuming IE and assuming that I remembered things right) ).