Graphic problem that i cannot fix PLEASE help!

Hi everyone,
I am new to this and have desperately been trying to fix this problem with no success.
I really want to use this theme: http://demo.nicetheme.com/index.htm?theme_id=142831
but when you mouseover to the right or the left of the main image, you get a "bandwidth exceeded" photo.
I have tried to find where to change/delete this image in the settings and cannot find it.
Can someone please give me some advice, it would be greatly appreciated!