In a Lua script I instantiate a new call leg and (attempt to) insert a new channel variable:

   local session = freeswitch.Session("user/1001@stuff.com")

   if session:hangupCause() == "SUCCESS" then

      session:execute("export", "my_variable=" .. myVariable)

      session:transfer("ext_in_mycontext", "XML", "mycontext")

However, I am not able to retrieve my custom channel variable later. This call leg is established correctly but there is no point in this call leg's life where I can seem to find my variable. Is there another method by which I should try to insert a channel variable in a newly created call leg?