Preloader freezes while downloading XML

Problem: My preloader freezes while downloading the XML file and all of a sudden displays the data.

I am working with a Flash file that has a AS 3.0 code on the first frame that displays the preloader and plays it. The entire preloader is in a separate movie clip that is dragged onto the stage (Frame 1) and given an instance name. No where in the AS coding do i see that instance name for that movie clip being used. XML file is being parsed in Frame 10 and is displayed in Frame 15. I want it to show the preloader while it is downloading or parsing that XML. Any suggestions, as to what could be causing the problem.

Thanks,