I have insertet data into a access DB and it worked fine.
I used the followin Syntax in php :
$db = odbc_connect ("Testdb","","");
$in = odbc_exec ($db,"INSERT INTO Formular (Kunde, Strasse, PLZ, Ort) VALUES ('".$Kunde."','".$Strasse."','".$PLZ."','".$Ort."');");
odbc_close_all();