Airport Extreme Website block.. ...

OK, I've got one for somebody smarter than me out there ( a lot i'm sure).
I have an airport extreme (n) and there is one particular website that I cannot access through the extreme, but if I pull the airport out and hook up directly to the cable modem I can get to this website. What gives? I get a warning like this:
Access Denied

You don't have permission to access "http://www.choicehotels.com/?" on this server.
Reference #18.72b1208.1234794491.13f1c1a

I went through earthlink and we determined it has to do with the airport..

Oh, the website is www.choicehotels.com

I have been able to access this up until about 3 weeks ago..

any helpful ideas?

Thanks

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Orignal From: Airport Extreme Website block.. ...