A family of Microsoft relational database management systems designed for ease of use.
#3320 is a table validation error.
Here is a link on setting up table validation:
http://www.allenbrowne.com/ValidationRule.html
Do you have a validation rule =Now() for a date field in a table?
Is this giving error 3320?
Perhaps you have a problem with the references in this database.
Open the code window and click on Tools | References.
You will need:
Visual Basic for Applications
Microsoft Access 14.0 Object Library
Microsoft Office 14.0 Database engine Object Library