Using a Textfield to mask an Object that has a Filter applied

Hi!

I have just run into this problem and i can´t seem to find anything about it…

Here´s what I wanna do:

I have several Sprites that are all combined in one parent Sprite. The parent Sprite then gets a Glowfilter applied and should then be masked by a Textfield.

Everythings working fine but as soon as I apply the Filter to the Sprite nothing shows… However, if I apply the Filter to every single Object that the Sprite contains, it works…

What´s wrong here?

Best, Chris