[jQuery] Having a problem with showing a div from parent.parent in ie (7)

[Khimaira]

As the subject says; I'm having a problem with showing a div from
parent.parent in ie (7)
here's my code:

Javascript:

                        parent.parent.$.blockUI({
                                message: $("#fileConf"),
                                fadeIn: 700,
                                fadeOut: 0,
                                showOverlay: false,
                                css: {
                                        border: 'none',
                                        padding: '20px',
                                        backgroundColor: '#000',
                                        '-webkit-border-radius': '10px',
                                        '-moz-border-radius': '10px',
                                        opacity: .6,
                                        color: '#fff'
                                }
                        });

Body:

                       <div id="fileConf" style="display:none;">
                                <a href="#" id="downloadFile" style="text-
decoration:none;font:15px arial;color:#fff">Download file</a> |
                                <a href="#" id="editFile" style="text-
decoration:none;font:15px arial;color:#fff">Edit file</a>
                       </div>

All this works just fine in FF, but in ie7, it throws and error
(invalid argument).

Any help would be appreciated.