Before run filtering Header of Period in timeline,it’s ok.
example: 1-oct-13 to 31-oct-13
But After run filtering  Header of Period in timeline,is changed to enddate:24 always in belows.
example: 1-oct-13 to 24-oct-13
Coding before and after filtering is same coding.
How can I solved this problem?
See in attached file.
#region add units and timeline
            var line = new TimelineView("timeline", "coachid");
            line.X_Unit = TimelineView.XScaleUnits.Day;
            line.X_Date = "%d";
            line.Dy = 20;
            line.Dx = 100;
            line.SectionAutoheight = false;
            var mCoachList =contextData
            
            var TimeLineEventtmp = new List<TimeLineEvent>();
            int i = 1;
            foreach (var smCoachList in mCoachList)
            {
                var TimeLinetmp = new TimeLineEvent();
                TimeLinetmp.key = smCoachList.CoachID;
                TimeLinetmp.label = smCoachList.Coachname;
                TimeLineEventtmp.Add(TimeLinetmp);
                i = i + 1;
            }
            line.AddOptions(TimeLineEventtmp);
            line.RenderMode = TimelineView.RenderModes.Bar;
            scheduler.Views.Add(line);
            #endregion
                        if (piCoachID != null && piCoachID != "")
                        {
                            scheduler.Views[4].Filter.Rules.Add(new DHTMLX.Scheduler.Controls.Rule("coachid", Operator.GreaterOrEqual, piCoachID));
                        }
