.net 链接sybase提示Client unable to establish a connection

搞了两天了

 AseConnection conn = new AseConnection("PROVIDER=ASEOLEDBProvider;Data Source=10.181.19.160;Port=2641; charset=eucgb; User Id=eai;Password=WanMa@Eai.Read;Initial Catalog=Wanma;");

 AseConnection conn = new AseConnection(conn); 

AseCommand command = new AseCommand("select top 10 * from bas_productm_price", conn);

            try
            {
                if (conn.State == ConnectionState.Closed)
                {
                    conn.Open();
                }
                AseDataAdapter adapter = new AseDataAdapter(command);
                DataSet ds = new DataSet();
                adapter.Fill(ds);
                dataGridView1.DataSource = ds;
                conn.Close();
            }
            catch (System.Exception ex)
            {
                throw ex;
            }

工作环境是： win7 + vs.net2010