How does WiFi work?
Getting connected just means that the radio in your phone has established a connection with the radio in the hotspot's router radio. That is the first step in negotiating a valid network connection...like plugging in a network cable into your RJ45 port. The computer and the router have to be instructed on what to do next.
Some networks use DHCP to issue a valid network IP address to any computer that connects. Some require a computer to authenticate with a user name and password. Some require a secure connection for that authentication. There are too many levels of security to go over for the purpose of this thread. But in order for you to get an IP address you have to communicate with the server that is behind that router you are connected to.
Once an IP adddress is "leased" to that computer (or your droid in this case) the computer needs more info about the network. Mainly it needs to know what DNS server is translating ip addresses to web addresses. It also needs to know the net mask setup. Netmask just tells the network how many connections are allowed and what type of address scheme it uses (class A, B, C...) and sort of works with DHCP to decide what IP adress to give (lease) to your device.
The IP Address does not need to be issued by the server thropugh DHCP. It can be hard coded into your device (Static IP rather than Dynamic). But it has to fit the rules of netmasking and the device has to know where the DNS server is (could be the same as the DHCP server or Domain Controller that authenticates your user name...or it could be three different servers).
In order for you to get the internet...your device has to answer all these questions. In order for your device to answer these questions you have to know how the network is communicating to all the nodes. The device has to match the network scheme. So talk to the network admin and get those answers.
We can only guess. Many have taken their best WAGs. Some will advise you to set up your device like they did theirs...since theirs works, yours should too, right? I'm not telling you how mine connects cuz it's top secret and I'd have to shoot you if I told you. <wink>