Loading Combo Box

Ok, I’m loading an external swf into an empty movie clip when I click a button. The external swf has a combo box in it. If I click the button, everything loads just fine, but say if I were to click it again, the external swf always moves to the top left corner of the page. And it only does that of the combo box in the external swf. I deleted the combo box and everything works fine. Has anyone ever came across anything like this? Thanks.