px150E disc car box problem

I just bought a Vespa PX150E disc, 2008, type ZAPM5.

A Carb box partnumber 990813 is fitted. I think is the wrong carb box, because it leaks air and oil and petrol because this box doesn't fit. There is a lot of space between the box and the engine. The oil pump and gasket are okay. I think this type Vespa has another carb box. Can anyone help me??