PHP getting a list of MS Access DB tables

hey, i need my php webpage to read in a specific access database and give a listing of the tables in that database.

here is the code i tried:

$db_connstr = "DRIVER={Microsoft Access Driver (*.mdb)}; DBQ=". realpath("path/db.mdb") ." ;DefaultDir=". realpath("path");
$db_connection->open($db_connstr);
$rs = $db_connection->execute("SELECT MSysObjects.Name, MSysObjects.Type FROM MSysObjects WHERE (((MSysObjects.Type)=-32764)) OR (((MSysObjects.Type)=-32756)) OR (((MSysObjects.Type)=5)) OR (((MSysObjects.Type)=1))");
$rs_fld0 = $rs->Fields(0);
while (!$rs->EOF) {
  echo "$rs_fld0->value<br>\n";
  $rs->MoveNext();
}
$rs->Close();
$db_connection->Close();

but it gives me this error:

Warning: (null)(): Invoke() failed: Exception occurred. Source: Microsoft OLE DB Provider for ODBC Drivers Description: [Microsoft][ODBC Microsoft Access Driver] Record(s) cannot be read; no read permission on 'MSysObjects'. in c:\www\analyzelog.php on line 113

this was pretty easy with asp, but i cant find anywhere how to do it with php. thanks!