Xml with <img> Tag under Mask

Hi all,

I have a problem with setMask & the <img> tag …

all stuff is at runtime
contentMC contains txtfield
overlay is mask MC
contentMC.setMask(overlay);

i load an external XML … wich contains <text>bla bla bla <img = src=“lala.jpg” width=“100” height=“100” />bla bla bla</text>
if i set mask on contentMC
the text is shown but the image is blank(hidden whatever)
as soon i remove the mask it´s there but the content scrolls outside (overlaps other stuff)

ne idea how to solve this ?