为何在运行到SDECur=SDEFeatCls.Insert(true)时出错说对此Class的编辑不在 edit session中啊

   IFeatureClass pFeatCls,SDEFeatCls;     IFeatureCursor FeatCur,SDECur;     WkEdit.StartEditing(false);     SDECur=SDEFeatCls.Insert(true);

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   WkEdit.StopEditing(true);

为何在运行到SDECur=SDEFeatCls.Insert(true)时出错说对此Class的编辑不在 edit session中啊,我不是包含在WkEdit.StartEditing(false);与WkEdit.StopEditing(true);中了吗??