Hi Team,I need to disable the calender tool tip in the rad scheduler.whenever i place the mouse over in >next month) it display the tool tip.so i shouldn't do that. That mouse over has to stop o that area.Because I've implemented the rad manager tool tip for every appointment.If i place through the next month icon of the calendar it returns the string.It shouldn't done like that. If so,i'm getting exception like input string is not in correct format.here is my code and attached image.protected void RadToolTipManager1_AjaxUpdate(object sender, ToolTipUpdateEventArgs e){ RadScheduler1.ToolTip = string.Empty; this.AdminController.State.Session.Schedule = new Schedule(userSession); int aptId = int.Parse((e.TargetControlID.Split('_')[3])); Appointment apt = RadScheduler1.Appointments[aptId]; this.AdminController.State.Session.Schedules = this.AdminController.RetrieveAllEventSchedules(); for (int i = 0; i < this.AdminController.State.Session.Schedules.Count; i++) { if ((apt.Subject == this.AdminController.State.Session.Schedules[i].DisplayPermitName) && apt.ID.ToString() == this.AdminController.State.Session.Schedules[i].ID.ToString()) { apt.Subject = "Permit Name : " + this.AdminController.State.Session.Schedules[i].DisplayPermitName + "<br>" + "Client Type Name : " + this.AdminController.State.Session.Schedules[i].DisplayClientTypeName + "<br>" + "Facility Name : " + this.AdminController.State.Session.Schedules[i].DisplayFacilityName + "<br>" + "Resource Name : " + this.AdminController.State.Session.Schedules[i].DisplayResourceName; } } AppointmentToolTip toolTip = (AppointmentToolTip)LoadControl("~/UserControls/AppointmentToolTip.ascx"); toolTip.TargetAppointment = apt; e.UpdatePanel.ContentTemplateContainer.Controls.Add(toolTip); aptId = 0;}Awaiting for your quick reply.Thanks,Daniel.B