Scope problem

We have an action script file where we use
_level0.sendrequest(request xml, respone xml)

and in time frame of flashdocument.fla we have _level0.sendrequest=function{}
and we are getting the request xml and using SendAndLoad tht requst is sent to some url and response is got, but the onload for this sendAndLoad is in that actionscriptfile.as
above sendrequest call. now will the response be available in onload function…
if not what should i use to get the scope…

thankx in advance
ramji