Levels

I have a dynamic text field (text_txt) and a movie clip (clip_mc) on the main stage. Inside the mc there is a button. When I click the button, I want to insert an HTML text inside text_txt. inside the button I typed the following, but a white area appears (I checked the code seperately and it worked, so I guessed the problems might to do with the levels??):


on (release){
 
 _root.text_txt.htmlText = "<img src='myFlash.swf' myMC_mc'>";
}