Movie clip plays out of sequence

I load a movie clip in Frame 1 of my Flash movie, and the clip starts playing immediately, even though I don't issue the play() command until the middle of the movie. I do the attachMovie in the first frame so that it has loaded by the time I want to play it, but it starts playing right away even though I don't tell it to play. I'm afraid to wait until frame 113 to load it, fearing that there will be a delay while it loads.

Here's the code in Frame 1:

var mc1:MovieClip;
mc1 = this.createEmptyMovieClip("DR1", this.getNextHighestDepth());
this.attachMovie("DR1", "mc1", this.getNextHighestDepth());


In Frame 113 I have:

mc1.Play();


But it starts playing immediately - doesn't wait for frame 113. What am I doing wrong?

Thanks,
Beth