Quick preview

Hello forum people.
I have a question about the new quick preview performance in TBS4.5. This window preview now open in the navegator window as swf player. This only play, no loops, no scrubbing, and when use bitmaps in the project only plays few seconds and stop. On top appears a window configuration message at each time that the player is launched. I cannot understand what configuration is request because this operation is doing in the local machine, not in internet on line. Second point: There any way to preview the scene without being stopped a few seconds? Thanks all for the assistance. I´m working on windows XP and Firefox navegator.