Masking special text

Hi,

How do I add text effects such as a mask to text that has strokes, or decorated text? I would like to have a masked effect on special type that has a stroke to it. Attached is a pic. Any help would be greatly appreciated.

Currently the mask works on static Arial text and when I convert the static text to a movie clip. But the mask doesn’t work when I convert the static text to dynamic text.

Please help!