How to pass data across swf which are called thru different html files?

Urgent:

Does anyone know how to pass data across swf which are called thru different html files?

For examlpe: There is file called “Interface.swf” which have a variable called userName. There is a button in **Interface ** which opens a file called “Help.htm” which inturns calls a file “Help.swf”. I need the variable userName from **Interface.swf ** to Help.swf. I have tried global variable but its not being passed as these are called thru two different html.

So, does anyone know the solution to solve this problem?

thanks in advance…