Are you trying to use an ODBC connection to get data from the IBM i (AS400)? Why not use the IBM i as the web server, or set up some requests to retrieve data from it using XML or JSON (using RESTful requests). Even at V5R2 the Apache web server on the IBM i is really good.
Sorry I can't help with ODBC. IBM won't help since your OS version is way out of date. The only other thing I can think of is if you try posting your question on the Midrange-L list at www.midrange.com.