Encrypted ZIP File with .docx Documents #81

So I've found an old ZIP File on my computer with two docx files in it.

Unfortunately I set a password years ago...

7z l -slt

`Path = Example_of_C_Code.docx
Folder = -
Size = 1101098
Packed Size = 1055092
Attributes = A
Encrypted = +
Comment =
CRC = 88DA98B2
Method = ZipCrypto Deflate
Host OS = FAT
Version = 20
Volume Index = 0

Path = How_I_made_it.docx
Folder = -
Size = 36693
Packed Size = 30468
Attributes = A
Encrypted = +
Comment =
CRC = 3FC01F92
Method = ZipCrypto Deflate
Host OS = FAT
Version = 20
Volume Index = 0`

So now I make these steps as I understood:

1. A plain.txt file with following content in it: 50 4B 03 04 14 00
2. I make a ZIP plain.zip from plain.txt, filename plain.zip | Deflate | Maximum
3. I run bkcrack

bkcrack -C path_to_encrypted.zip -c Example_of_C_Code.docx -P plain.zip -p plain.docx

bkcrack tells me could not find the keys.

What am I doing wrong?

Thank you for the help, much appreciated in advance!