Syntax error in CONSTRAINT

I to everybody!

I created a query like this in Access:

ALTER TABLE Ordini
ADD CONSTRAINT FKOrdiniIdCliente
FOREIGN KEY (IdCliente) REFERENCES tm_Cicli (ProductID)

It works rightly!
If I add two more commands

ALTER TABLE Ordini
ADD CONSTRAINT FKOrdiniIdCliente
FOREIGN KEY (IdCliente) REFERENCES tm_Cicli (ProductID)
ON UPDATE CASCADE
ON DELETE CASCADE

I receive a syntax error:
"Syntax error in CONSTRAINT"

Does anybody know why?

Thank you very much!