SQL Server 2000企业管理器：无法查看添加到视图设计器的表中的列

I have a SQL Server 2000 database that will not display the column list for any tables in the View "designer" in Enterprise Manager This problem exists when either designing a new view or when editing existing views. All that is displayed for each table in the diagram is "* (All Columns)". The views otherwise work.I have a SQL Server 2000 database that will not