If you can access it via a browser, you can access it through perl.
there are a lot of ways that people will try to verify you don't, but in the end, it is possible.
what happens when you telnet to the address?
are you setting the user agent?
is this url in the middle of a sequence? you may need to set the referred from, too.
these are what I can think of off the top of my head. there's probably a whole lot more.