I have hama penalizer pro keyboard (http://www.amazon.co.uk/Hama-Penaliz.../dp/B000VRJHEM) on Ubuntu 11.10. All the ordinary keys work just fine, but those aditional ones(multimedia, browser, macro keys) do not work at all. When i try showkey -s there is no response from these buttons. What can I do to make them work?

Any help would be appreciated.