Not trying to step on any toes but maybe for once I can help someone else on here.
If you are using XP, as I think you are from the "limited or no connectivity" message it gave you, I often have the same problem.
To solve it I just open the network connections dialog either from the taskbar by right clicking the wireless symbol or in start>setiings>network connections and select the network, then click on the change settings option on the left. After that open the wireless settings tab and check the "use windows to manage ....." box at the top. Clicking ok after that fixes it for me hope this helps you also.
Another prob I sometimes have after using wires is that the laptop turns of the wireless card to save power. The Device Manager can help you change that setting, I think.