make text box invisible?

I can't click load a flash movie and get a text
box to go invisible....seems simple enough

here are the steps I've tried

To recreate...

1) draw a dynamic text box on frame called txt1
2) add action script to frame
txt1._visible = false;
3) play flash movie and you will see dynamic text box is still there

this is my last ditch effort...
thanks for any help getting my text box to disappear!

Convert that dynamic text box into a movieclip (mc1).
Use this script: mc1._visible = false;.
;)

Aha! I'd wanted to make some text that fades in, and this method works for that too! Although it only seems to work for regular text, not dynamic text?