I can see that there is no extension on your link to the pictures. No .jpg or .gif at the end. You are either copying the wrong URL or most likely not all of it. It needs to end in .jpg or something like that depending on your host. Holler if you need more help.
I may be wrong but I have an idea. Sam points out that there is a .jpg in the middle of it but even stopping there it still doesn't work. I have a thought. Back when we used to use imagestation for a host if we used the URL on the thumbnail of our pictures we got a URL that didn't work. If we clicked on the thumbnail and copied that URL one the pic was larger, it worked. Just a thought. Also some web host don't let you link. Try fotki, it's free and you can store tons and link to them. Just remember to stop after the .jpg :-)