Connect TimesTen database from C# asp.net

Hi, I'm trying to connect to Oracle TimesTen database using c# .net and having problem. The error is "ORA-29158: Unable to open library". However, it works fine when I use SQL Developer to access. The error is when it called [login to view URL](); Any idea? I think I missed configuration some where. Thanks, LT ------------------------------------------------------ db = "mytns_sampledb_1121"; user = "appuser"; pwd = "mypassword"; count++; try { string connStr = "Data Source=" + db + ";user id=" + user + ";password=" + pwd + ";Statement Cache Size=0"; OracleConnection conn = GetConnection(connStr); //To fill DataSet and update datasource OracleDataAdapter productsAdapter = new OracleDataAdapter(); //In-Memory cache of data DataSet productsDataSet; //Fetch Product Details [login to view URL] = new OracleCommand("SELECT * FROM PRODUCT", conn); //Instantiate DataSet object productsDataSet = new DataSet("productsDataSet"); //Fill the DataSet with data from 'Products' database table [login to view URL](productsDataSet, "PRODUCT"); [login to view URL]("Completed"); } catch (Exception ex) { } ------------------------------------------------------ public OracleConnection GetConnection(String connStr) { OracleConnection con = new OracleConnection(); [login to view URL] = connStr; [login to view URL](); return con; }