Images Not Showing

Please HELP. I just started this site. All’s well at the start. Then the images in the menu icons (when in edit and add new page/post), and the image in my post stopped showing in visual mode. However, the image html code is there. When I viewed the post, image is not there including my header graphics.

Since I had just started, I decided to remove WP from my domain. I started over again:

Here’s what I found:

1. Even the header graphics in Twenty Ten theme is not showing.
2. I installed flexibility again. Going into themes, even the image icons of the available themes are not showing.
3. I went to dashboard of my 2 other sites and their working perfectly. The images are showing in the web.
4. It seems that the images problem is on this one particular domain. This is a domain I bought on auction. I don’t know if something is wrong with this domain. But, it is indexed in google before I bought it.

What could be wrong? I hope someone has the answer

Thanks