Mask on Dynamic Textbox

I encountered a strange problem in Flash when I tried masking a dynamic text box and it didn't work. After doing lots of research on the internet I found out that if you mask a dynamic text box the text won't appear.

So to save time for the people trying to mask the dynamic text box here is the tip, click your text box in the properties panel click the Embed button and embed the fonts and your text will start appearing again.