Is it a USB-3 hub? If I remember rightly some USB-3 hubs don't play nicely with the RPi.
You shouldn't need drivers other than the OS's generic ones as hubs are supposed to conform to the standard. Only time you should need extra drivers would be if the hub has extra features like built in ethernet ports which the RPi hub has (not zeros as they don't have a hub). But even then those extras should be presented as devices connected to the hub.
Typically 7 port hubs are really two cascaded 4 port hubs, I take it you tried all the ports just incase there's a problem with connecting through 3 hubs (though theoretically there shouldn't be).