Subgrid.control.refresh() don't work in IE Browser

Hi guys, 

I'm using Dynmaics CRM 2015 onPremise (7.0.0.3543) (DB 7.0.0.3543)

I want to customize a subgrid filter to dynamiccally show records according some criterias.

I'm using this code :

        var ActivitiesSubgrid = window.document.getElementById("activities");

        if (ActivitiesSubgrid == null) 
            ActivitiesSubgrid = window.parent.document.getElementById("activities");

        if (ActivitiesSubgrid == null) {
            setTimeout('CRM.Accounts.AddFilter()', 500);
            return;
        }

        if (ActivitiesSubgrid.control != null) {

            ActivitiesSubgrid.control.SetParameter("fetchXml", fetchxml); //set the fetch xml to the sub grid   

            ActivitiesSubgrid.control.refresh(); //refresh the sub grid using the new fetch xml
            
          } else {
            setTimeout('CRM.Accounts.AddFilter()', 500);
        }

This code works fine in Firefox, but when I try it in Internet Explorer, this instruction don't work :

ActivitiesSubgrid.control.refresh();

there is no error in the IE debugguer console but it dosen't work. And this instruction dosen't work in both IE and Firefox.

Xrm.Page.getControl("activities").refresh();

Did you have an idea about this behavior ?

        var ActivitiesSubgrid = window.document.getElementById("activities");
        if (ActivitiesSubgrid == null)             ActivitiesSubgrid = window.parent.document.getElementById("activities");
        if (ActivitiesSubgrid == null) {            setTimeout('Paprec.Client.AddFilter()', 500);            return;        }
        if (ActivitiesSubgrid.control != null) {
            ActivitiesSubgrid.control.SetParameter("fetchXml", filter); //set the fetch xml to the sub grid   
            ActivitiesSubgrid.control.refresh(); //refresh the sub grid using the new fetch xml            ActivitiesSubgrid.control.refresh(); //refresh the sub grid using the new fetch xml                      } else {            setTimeout('Paprec.Client.AddFilter()', 500);        }