Dynamic textfield problem, can someone help?

Hi all,

I have a movie clip instance on the stage called textContainer_mc.

On frame 25 in this mc I have a dynamic text field with an instance name of infoText_txt.

Im trying to access the text field via my actions frame on the root timeline like this;

textContainer_mc.infoText_txt.text="welcome";

The problem is if I put the text field on frame 1 of the textContainer_mc the text field shows but if its on frame 25 it doesnt.

I need it on frame 25 because I want the text to show up after an animation has played.In other words I want the textfield to stall from showing until the animation inside textContainer_mc has finished playing which takes 25frames.

Can anyone help with this problem?

Thanks