How do you place images into a subdomain website

I'm using sub-domains for the first time. For some reason I can't place the images using html. For instance; -- <img src="photos/pic1.jpg"> -- does not work, the image does not show. I've used the every option to the directory-- <img src="http://.www.mysite.com/photos/pic1.jpg"> -- <img src="/photos/pic1.jpg"> ----<img src="photos/pic1.jpg"> -- Nothing works, but it worked fine before I subbed the website under mine. The funny thing is the same photos show if I use them as background images using css. Please help.

This is the website:
http://iuf.icedinteractive.com/index.php , all the images are background images placed using css, they won't show if I try to place them using html as normal images (not background)