Just by changing the extension of a file from .csv to .mdb wont help you , since Access will most likely complain that the file is not a valid MDB file...you'll need to dynamically import the csv file into an exising access database... if u have access to Access type library, the look for methods which will simulate importing data dynamically... hope this helps...

Update : if u have Access installed, go to
File->Get External Data->Import, to get a clearer idea of what u need to simulate dynamically.