Do you have a static ip or a dynamic ip with your service provider? If you have a static ip then you are stuck with that. Static ips are what webservers etc. use. If you have a dynamic ip (Usually what you get with dsl/cable) then your ip changes every time your computer starts or connects to the internet.
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Hope this helps,
Macrules101
http://forums.appleinsider.com/showt...threadid=46032
Not sure how well he got on....