急求：代码修正

Question

我用VB.net调用SAS存储程序，想将生成的SAS数据集result用VB.net 读入并通过datagridview显示在VB界面上

            Dim cn As OleDb.OleDbConnection = New OleDb.OleDbConnection()
            cn.ConnectionString = "Provider=sas.IOMProvider; Data Source=_LOCAL_"
            Dim cmd As OleDb.OleDbCommand = cn.CreateCommand()
            cmd.CommandType = CommandType.TableDirect
            cmd.CommandText = "libname mylib.result."
            Dim reader As OleDb.OleDbDataReader = cmd.ExecuteReader()
            Dim obAdapter As New System.Data.OleDb.OleDbDataAdapter("select * from mylib.result", "provider=sas.iomprovider.1; SAS Workspace ID=" + obsas.UniqueIdentifier)
            Dim obDS As New DataSet()
            obAdapter.Fill(obDS, "sasdata")
            DataGridView1.DataSource = obAdapter

但是一直提示说未处理OleDbException <?xml version="1.0" ?><Exceptions><Exception><SASMessage severity="Error">没有分配逻辑库引用名“LIBNAME”。</SASMessage></Exception></Exceptions>
急求各位高手帮忙修改！非常感谢！