connection failing in Sybase 12.5.1

Question

have Sybase 12.5.1 client version installed on my machine, whose corresponding Sybase.Data.AseClient.dll is registered in GAC. when i try try to connect to the database using the following code - private void Page_Load(object sender, System.EventArgs e) { // Put user code to initialize the page here String connStr = "Driver={SYBASE ASE ODBC Driver};Srvr=PAEHOWUD284,5201;DB=ribs;Uid=x131608;Pwd=x131608" ; AseConnection oAseConn = new AseConnection(connStr) ; String strSelect = " select * from optextn_rider " ; AseCommand oAseCmd = new AseCommand(strSelect) ; AseDataAdapter oAseAdp = new AseDataAdapter(oAseCmd); DataSet ds = new DataSet() ; oAseAdp.Fill(ds,"OPTEXTN_RIDER") ; grdRptList.DataSource = ds; grdRptList.DataMember = "OPTEXTN_RIDER" ; grdRptList.DataBind() ; } i get the following error - SelectCommand.Connection property has not been initialized. what can be the possible problem or rather solution ??