Strong Signal, No Connection

Don't know if there is a shield in this area or what, but I'm in some sort of dead spot with my T-Mobile wireless Internet connection. I've got four bars on my console but the connect won't go. It worked less than a mile away at Wegman's on Friday, but indoors, outdoors, it won't work here. And of course there's no hotspot nearby. Oh well. At least it gives me time to write a few blog entries.