ActionScript 3.0 :: Flash - Keep Animation Running While Receiving Large Data File?

I'm developing a web application with Flash CS5 and AS3.0. The problem I'm having is this:At a certain state, the application goes to a frame with a "loading..." animation that loops continuously until the next state is reached. The animation is inside a MovieClip that lives on this frame on the stage (I'm not creating or animating it dynamically). While in this state, the app is waiting to receive a large xml file from an XmlSocket connection. The file takes a few seconds (literally - not milliseconds) to be received fully by the Flash player, and during this time the loading animation stops. I believe the socket is blocking the animation thread until it's done receiving the entire file.Does anyone know of a workaround that would allow the animation to keep playing while the socket is receiving? I've seen pseudo-threading hacks, but those always deal with computations or other activities that can be accomplished by calling a call-back function multiple times. Since I'm just listening on an open socket, there's no callback I could pass to a pseudo-thread.