This error is typically encountered when your script attempts to perform an UPDATE or some other action that alters the information in the database. This error occurs because ADO is unable to write to the database for one of the following reasons.

1. The most common reason is that the Internet Guest account (IUSR_MACHINE), which is by default part of the “Everyone” group, does not have Write permissions on the database file (.mdb). To fix this problem, use the Security tab in Explorer to adjust the properties for this file so that the Internet Guest account has the correct permissions.
2. Another cause of this error is that the “Read Only” setting may be checked in the Options page for this DSN in the ODBC Manager.