Cannot Find Installable ISAM

I am working on a free hosting site that supports ASP. Uploaded a Microsoft Access db(version 2000) and configured using dsn-less connection (a must for the site) but cannot open db getting the error: cannot find installable ISAM. Here is my code. Is the problem with my code, a problem with the access db driver on my computer, or a problem with the servers drivers?

<%Dim conn, rs

set con = server.createobject("ADODB.connection")
set rs = server.createobject("ADODB.recordset")
dsnname = "driver=microsoft access driver (*.mdb);dbq="
dsnname = dsnname & server.mappath ("/database/promotions.mdb")
conn.open dsnname
sql = "SELECT * FROM Clients"
rs.open sql,conn,3,3
rs.movefirst
do until rs.eof
%>