OWA http 400 bad request error

I have an sbs 2003 BE/FE server that I am having OWA problems. If I try to get into owa on the server, or outside the domain I get an HTTP 400 Bad Request error.  I tried using servername/exchange and, as well as External_IP/exchange.  They all do the  same thing from both the server or outside PC's.  
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Have you looked at this article ?  http://support.microsoft.com/kb/842693

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degoodwinAuthor Commented:
I had looked at it but I checked it again and realized that the default port was set to 8080 and not 80. I changed it and it works now.
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