C#arcgis engine DevExpress

arcgis engine开发过程中，使用DevExpress.XtraBar的ribbon control控件后，mapcontrol上点击无法响应

private void btnSelFeat_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
{
try
{
ICommand m_SelTool = new SelectFeatureToolClass();
m_SelTool.OnCreate(mainMapControl.Object);
m_SelTool.OnClick();
mainMapControl.CurrentTool = m_SelTool as ITool;
mainMapControl.MousePointer = esriControlsMousePointer.esriPointerArrow;
}
catch (Exception ex)
{
}
}

以上是点击ribbon control的button后，在mapcontrol上点击鼠标，实现选择要素等都没有反应了，如果换成普通的form button就不会有问题