I had the same problem, HAD being the key word there... and it was really bumming me out, because there are such greta attachments and signature pics on here...... after an ENTIRE day of looking for various reasons and changing this after this after that.... I IGNORED hubby's advice that it wasn't my firewall doing it... and disabled it temporarily... then refreshed the page I was on, and VOILA there was the attachment!~ If this happens to you... check the settings on your firewall... i am running Nortons.