PWA 2010 RemoveResourceCustomFieldsRow

hello 

please find the below code 

  SvcResource.ResourceDataSet resourceDs = resourceClient.ReadResources(string.Empty, false);

            Guid resVimal = new Guid("eb536541-e934-45fa-a9c6-8189fb4aa3d9");
            resourceClient.CheckOutResources(new Guid[] { resVimal });
            foreach (SvcResource.ResourceDataSet.ResourceCustomFieldsRow row in resourceDs.ResourceCustomFields.Rows)
            {
                if (row.MD_PROP_UID == ResourceDepartmentUID && row.RES_UID == resVimal && row.CODE_VALUE == ResourceDepartmentValue)
                {
                    resourceDs.ResourceCustomFields.RemoveResourceCustomFieldsRow(row);
                 //   resourceDs.ResourceCustomFields.del
                    //resourceDs.ResourceCustomFields.rem
                    break;
                  //  row.CODE_VALUE = ResourceDepartmentValue;
                }
            }
            resourceClient.UpdateResources(resourceDs, false, false);
            resourceClient.CheckInResources(new Guid[] { resVimal }, true);

the above code is not removing the department value, can any one please guide me for the same

thanks

vimal

regards Vimal