my resque-mailer problem

gistfile1.rb

## some message controller
    feedback_params = {:message_body => params[:message_body], 
                       :person_name => params[:person_name], 
                       :phone_number => params[:phone_number], 
                       :user_email_address => params[:email_address], 
                       :message_subject => email_subject,
                       :to_addr => to_address}
    UserMailer.send_feedback(feedback_params).deliver

## Mailer controller
    def send_feedback(message)
      @message = message
      mail(:to => message[:to_addr], :subject => 'some_subject')
    end

## Resque verbose
(Job{mailer} | UserMailer | ["send_feedback", {"to_addr"=>"roy@example.com", "message_body"=>"this is a message"...}]) failed: #<ArgumentError: At least one recipient (To, Cc or Bcc) is required to send a message>