connecting a database

I am trying to set up an Access datasource, but when I verify it I get this message:

Connection verification failed for data source: ask
java.sql.SQLException: [Macromedia][SequeLink JDBC Driver][ODBC Socket][Microsoft][ODBC Microsoft Access Driver] Could not find file '(unknown)'.
The root cause was that: java.sql.SQLException: [Macromedia][SequeLink JDBC Driver][ODBC Socket][Microsoft][ODBC Microsoft Access Driver] Could not find file '(unknown)'


HELP!!!PLEASE!!