Forms not appearing in "Edit This Application"

Forms not appearing in "Edit This Application"

Hi, hope someone can help. I can't see any of my forms when i try to edit them, in "edit this application". Get the error symbol appearing in bottom left hand corner of Internet Explorer 8. When I click on it, it gives me the following error message:-
 
Webpage error details
User Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/4.0; GTB6.6; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C)
Timestamp: Mon, 11 Apr 2011 13:58:50 UTC

Message: Object required
Line: 20
Char: 2
Code: 0
URI: http://creator.zoho.com/appcreator/js/edit/GridCust.js




 
Tried it on 2 different computers and in FireFox and its still not working.
 
Thanks
Chris