how to maintain ASP session during navigateToURL (safari issue!)

Question

I have the following AS3 code that requires asp.net SESSION cookies remain intact, now it seems that SAFARI does not keep cookies well. (all other browsers are OK).

I have cookie based sessions at the moment, question is how to alter the following code to support COOKIELESS sessions in case it works better?

  var request:URLRequest = new URLRequest("my.server.com/my.aspx?myparams=xx")
   try {
   navigateToURL(request, '_top'); 
   } catch (e:Error) {
   trace("Error occurred!");
   }
   return 0;

Or is there something else to try ?