Help: Accessing main timeline var from SWF loaded in a UILoader

Greetings enlightened ones

Here’s my problem:
I have a main swf movie in which a var is defined on its main timeline. I have a UILoader on that main timeline which loads an other SWF.

Here’ what I need to do: How can I let the loaded SWF in the UILoader access that variable on the main timeline of the main swf?

Please help