Rails - Sep 2010 - Problems with ajax in Rails 3

Dear all:
     I''m new to Rails and I''ve encountered some problems with
ajax in
Rails 3. My project is on a Ubuntu 10.04 LTS machine with ruby v1.8.7
and rails v3.0.0.

I''ve changed my rails.js file according to :

http://github.com/rails/jquery-ujs/blob/master/src/rails.js

and also changed my javascript_include_tag to these three paths:

  1."http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"
 
2."http://ajax.googleapis.com/ajax/libs/jqueryui/1.7.2/jquery-ui.min.js"
  3."rails.js"

Everything works just fine except a controller with a ssh connection
behavior.

In my malfunctioned controller:

def remoteStatus
    @ip = params[:server][:ip]
    @sshid = params[:server][:sshid]
    @sshpass = params[:server][:sshpass]
    Net::SSH.start(@ip, @sshid, :password => @sshpass) do |
  session.exec!("free | awk ''NR==2 {print rate =
$3/$2*100}''") do
|channel, stream, data|
            @memusage = data
  end
    end
    respond_to do |format|
        format.js
    end
end

In the remoteStatus.js.erb I have:

$(''#status_div'').append("<%=@memusage%>")

I am pretty sure that I can have the ssh connection result in variable
@memusage. But it seems that it never appends to the status_div block in
the corresponding view. I''m wondering if I am missing something
detailed. Can anyone help me here,please and thanks!

Best regards
-- 
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