Full Signal, Won't Join Available Network

I work for an airline, spend a lot of road time in different hotels. I have an issue with my PowerBook G4 where it will see the network, show a full-strength signal, but will not join. I get the 'You are not connected to the internet" screen. I run diagnostics, but nothing seems to work. It's infuriating to have a full signal for an open network and not be able to connect.
Latest time was at a Ramada in Houston. I've connected there before, but not this time, over 2 days and 3 or 4 reboots. When I went to the airport and my crew room, I connected fine.
I do notice that no signal is transmitted when I have this problem. It's like some outgoing firewall is preventing me from sending the request, but I don't know what would do it.
One other thing. When I went to Network Prefs/ Network/Show Airport/TCP-IP, I copied the number listed as the IP address and pasted it on to the url line. It brought me to an "Apache Web Server" page. I could move around in it as long as links contained only numbers and not worded addresses. Also the people at the front desk said no one else was having probs so it seems to be my PowerBook with the hoodoo.
Richard

EXACTLY! That's what I see, I don't get a re-direct to a login page, so I can't move on from there. The front desk did give me an 800 help number, but all I got was an unidentified voicemail who never called back.
I have this at the airport too if more than one wireless provider is available. Sometimes my airline's signal is bogged down, so I switch the Airport card to Sprint wifi, but I can't get a re-direct to their login screen, so I can't get on the internet. From what you said, the support people can give you the login url sometimes. I'll have to hope I have better luck next time with the support number. This particular time I rebooted ad naseum over two days with no luck. Or, whenever I CAN log in, I will have to bookmark the page for the future.
Thanks,
Richard

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Full Signal, Won't Join Available Network

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