Here is one thing to try:
change your connect string to this:
strConnString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & Server.MapPath("/db/forum.mdb") '## MS Access 2000 using virtual path
Also, do you have Microsoft Access 2000? If so, you can convert the database to MS Access 2000 (right now it's MS Access 97). If not, let me know and I can send you a MS Access 2000 version of the default database.