Direct Show Problems

Hi there! I''ve got 2 DirectShow Problems: 1: When i play a mp3 file, it replays with a little break, when in loop. Why, is this normal for mp3 files or for direct show? The wav file didn''t have this break. 2: I try to draw a mpeg file to a texture, like in this directshow example, i even have similar code, BUT it crashes when i try to add the filter to the graph without any message. Why? using dx8.1, and thx for every answer.