Variables -> variables -> variables

Ok, I want to know how I can pass some variables betwee movies.

I have a main stage Movie (swf) that two other swfs are loaded into.
first one then a link from that one leads to the second. all while loaded to this main Movie.

the first sends a variable to the main movie which in turn I want to “send to” or “hold for” the second movie swf to utilize for some code in the second Movie.

I got it to work on a MAC but the same page will not work for PC.
Is ther a special way to store variables for PC like “trace” or something?

Mine is based off a LoadVars and a _global variable being passed.