[orkut-developer] requestSendMessage not working?

I am building an app/gadget that needs to be able to send a message to friends of the current user. So I'm doing something like this: opensocial.requestSendMessage(selected_friend_id, This is the message, function() {}); The only thing I get back from this call, however, is this error:

[orkut-developer] 3-legged oauth question

Hoping someone here is familiar with the opensocial gem for Ruby and can help me figure out how to do this. I need to do 3-legged auth for an app I'm writing. I've found some example code (like here: http://code.google.com/p/opensocial-ruby-client/wiki/GettingStarted) of how to connect to Orkut