[jQuery] Jquey Block UI is not working in IE 6

[jQuery] Jquey Block UI is not working in IE 6


Hi All,
We are usung Jquery Block UI it is working fine in firefox
but not in IE, We are displaying Pop-up before the User deletes a row
(Confirmation popup) if the user clicks OK , we need unblock it not
working IE.
Here is the code
function delete(){
jQuery.blockUI({
    message: $('#deleteMessage'),
    css: {
     height: '200px',
     width: '600px'
     }
     });
}
function removePopUp(){
     jQuery.unblockUI();
         return false;
}