You can find links to the latest manual in here - might be a good idea to go through it to solve your problem. It will help you get better aquainted with the desk and it's functionality.
(I know - I tend to dislike when people give me that answer... the truth is I don't remember it at the top of my head
Also - if you haven't already done so - you can find a hack in here, that will allow you to use the "latest" software version (5.1).