Problem with dynamic text and a mask

I’m having an issue with dynamic text. I have a file which I load into my flash movie to populate a dynamic textfield. Everything worked fine.

But, as soon as I put a mask on that textfield, the text disappears. If I move it away from the mask, it works fine. But behind the mask, no go.

Am I doing something wrong, or is there a way around this? I ned this to work with Flash 5 players.

Thanks much!