please help me : can't find the DOOR KNOCKER PIÈCE 1/2 ( chapter 6)

I HAVE THE ITALIAN VERSION BUYED JUST 1 WEEK AGO.

hi, in chapter 6, I have just

Examined the crate in the lower right; break it with the CROWBAR.
Took the BOARDS .

But is no DOOR KNOCKER PIECE 1/2

I have found the DOOR KNOCKER PIECE 2/2 ( in the letterbox)

I come back to the create but it is impossible now to examine it again.

HOW CAN I GET THE DOOR KNOCKER PIECE 1/2??? P

PLEASE HELP..............

Thanks........