DNS Error in IE

My site, http://blog.nplsolutions.com/ shows up just fine in Firefox, but when I try to use it in Internet Explorer, it says:
“The page cannot be displayed
The page you are looking for is currently unavailable. The Web site might be experiencing technical difficulties, or you may need to adjust your browser settings.”
At the bottom it also has a little note that says “Cannot find server or DNS Error”. This just doesn’t make sense to me because the site works just fine in Firefox. Also, I can get to my admin area in IE, it’s just the blog doesn’t show up. Any suggestions?

Thanks,
Nicky