Read several ms access files

Hi all,

I am trying to perform a ETL to extract information from several mdb files.
I need to execute the same query over each mdb file. To do this, first I put a Microsoft Access Input with a regular expression .\*.\mdb to obtain all of them from a folder. But now, I don't know how to follow. I am trying to create a ms access connection but I can't.
I am a noob in Pentaho, please can you help me?

Thanks!