Look for these lines (appx 52-57):

'#################################################################################
'## SELECT YOUR DATABASE TYPE AND CONNECTION TYPE (access, sqlserver or mysql)
'#################################################################################
'strDBType = "sqlserver"
'strDBType = "access"
'strDBType = "mysql"

Remove the apostrophe from in front of the line representing the type of database you're using.

Next, look for these lines (appx 59-72):

'## Make sure to uncomment one of the strConnString lines and edit it so that it points to where your database is!
'strConnString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & Server.MapPath("dbase/snitz_forums_2000.mdb")         '## MS Access 2000 using virtual path
'strConnString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & Server.MapPath("/USERNAME/db/snitz_forums_2000.mdb")  '## MS Access 2000 on Brinkster
'strConnString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=c:\inetpub\dbase\snitz_forums_2000.mdb"                   '## MS Access 2000 using physical path
'strConnString = "DRIVER={Microsoft Access Driver (*.mdb)}; DBQ=" & Server.MapPath("dbase/snitz_forums_2000.mdb")        '## MS Access 97 using virtual path
'strConnString = "DRIVER={Microsoft Access Driver (*.mdb)}; DBQ=" & Server.MapPath("/USERNAME/db/snitz_forums_2000.mdb") '## MS Access 97 on Brinkster
'strConnString = "DRIVER={Microsoft Access Driver (*.mdb)}; DBQ=c:\inetpub\dbase\snitz_forums_2000.mdb"                  '## MS Access 97 using physical path
'strConnString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" & Server.MapPath("dbase/snitz_forums_2000.accdb")      '## MS Access 2007 using virtual path
'strConnString = "Provider=SQLOLEDB;Data Source=SERVER_NAME;database=DB_NAME;uid=UID;pwd=PWD;"                           '## MS SQL Server 6.x/7.x/2000 (OLEDB connection)
'strConnString = "driver={SQL Server};server=SERVER_NAME;uid=UID;pwd=PWD;database=DB_NAME"                               '## MS SQL Server 6.x/7.x/2000 (ODBC connection)
'strConnString = "Provider=SQLNCLI;server=SERVER_NAME;database=DB_NAME;uid=UID;pwd=PWD;"                                 '## MS SQL Server 2005 w/ SQL Native Client
'strConnString = "driver={MySQL ODBC 3.51 Driver};option=16387;server=SERVER_IP;user=UID;password=PWD;DATABASE=DB_NAME;" '## MySQL w/ MyODBC v3.51
'strConnString = "driver=MySQL;server=SERVER_IP;uid=UID;pwd=PWD;database=DB_NAME"                                        '## MySQL w/ MyODBC v2.50
'strConnString = "DSN_NAME"

Depending on which type of connection to the database you wish to use, remove the apostrophe from in front of the line and change the path/user name/database name/password (as appropriate).