Odd getBytesLoaded problem

Basically I have a preloader in say the root swf & I’m loading in a swf in an empty movieclip. Very basic.

When I do this and trace out (with onEnterFrame) the getBytesLoaded on my PC I get the number. On my two fellow work mates I get undefined. We are all running same browser same Flash version.

Anyone every seen this? I’m constantly checking and still undefined, if I put it on the web it works fine on their PC’s. Problem is some of the stuff we do goes on CD so I need to find a resolution to this…just odd.

Edit: Oh & if I try to trace out ._framesloaded that works fine…