yeah, you will probably have to put the focus to the flash movie then to the text area, so in the HEAD tag of your html put
<script language="javascript" type="text/javascript">
document.getElementById("Flash_files_ID").focus();
</script>
then to your flash
myInt=setInterval(function(){
Selection.setFocus("textboxname");
}, 500);
so what i have done is used js to set the focus of the flash movie, then after 500 ms i have told the flash movie to then set the focus… hope it works, though I do not know if it works, get back to us:D