OSX Lion and MyBook World White Light

I have the same thing- can’t connect except as a “guest”.  I get the error:

“The version of the server you are trying to connect to is not supported. Please contact your system administrator to resolve the problem.”

I’m a total newb with NAS and can’t even remember how to update the firmware when it does come out.  Can anyone remind me? 

Is there anyway to use my drive until the update comes out?