Motion tweening dynamic text

Hi ppl !!

i have been trying to make a motion tweening including some text. As long as the text is STATIC TEXT all goes on fine, BUT if i choose the text to be Dynamic ( in order to make it more legible) the text doesn’t appear in the swf.

why is that ??

my english is not very good … if someone doesnt understand i upload a .fla example.

tkx