Password for an image?

I just started working with the ASP WebMatrix and I added a simple gif to http://www.pentalaboratories.com/contact.asp? and now anytime someone visits a password box pops up. When I delete the image no pop up. What do I need to do to prevent this?
Thanks for any help,Sounds like the directory that contains the image is requiring SSL. Check out the settings in IIS and see if this is the case. Also you may try different images in different directories.

dave
It was a permissions thing. Thanks you got me on the right path.
Mike