// check if a Folder name exists
		// daniela, january 15th, 2007
		// public bool AddNewFolder(Guid ownerId, string folderName, ref Guid folderId)
		public static bool CustomFolderExists(string folderName, string folderId, string userId)		
		{
			bool returnValue = false;
			SqlCommand sqlAdd = DBHelper.GetDBCommand("Mail_CustomFolderExists", CommandType.StoredProcedure);
			DBHelper.AddINParamToSqlCommand(ref sqlAdd, "@UserId", SqlDbType.VarChar, userId);
			DBHelper.AddINParamToSqlCommand(ref sqlAdd, "@FolderId", SqlDbType.VarChar, folderId);
			DBHelper.AddINParamToSqlCommand(ref sqlAdd, "@FolderName", SqlDbType.NVarChar, folderName);
			DBHelper.AddOUTParamToSqlCommand(ref sqlAdd, "@Exist", SqlDbType.Bit);

			DBHelper.AddRVParamToSqlCommand(ref sqlAdd);
			DBHelper.ExecuteNonQuery(ref sqlAdd);
			returnValue = (Boolean)sqlAdd.Parameters["@Exist"].Value;
			sqlAdd = null;
			return returnValue;			
		}