Connecting To Sybase From MS SQL Server 2000

I've installed Sybase client 12.0 and have created the DSN (it is successful, connection is established)
but when I run this ActiveX Script from DTS Package it give me error Data Source Name not found and no default driver specified

Dim RS
Dim oConn


Set oConn = CreateObject("ADODB.Connection")
msgbox "set oConn"
Set RS = CreateObject("ADODB.Recordset")
msgbox "RS"
(I've tried both open statement in both it gives me same error)
oConn.Open = "Driver={Sybase ASE ODBC Drivers};Srvr=Server1;Uid=sa;Pwd=password"

oConn.Open="DSN=Test;Uid=sa;Pwd=password"
msgbox "open"

Can anyone guide me?

Thanks in advance

-Sejal