appendChild not working in IE6 and IE7

[lxndr]

The following code is being used to add a div to the parent page from within an iframe and is working in Firefox, Chrome and Opera but not in IE6 or IE7 (the other IEs haven't been tested yet):

 

parent.window.document.body.appendChild(newDiv);

 

 

Can anyone suggest what the problem might be and whether there's a way round it ?

 

Thanks in advance.

 

[lxndr]

Update: Now solved, I needed to create the div to be appended in the parent not the iframe.