It should be already cracked.
On the thousand(s) people who installed from this setup, you're the first with such problem!
Are you really using the AOM_Gold.rar that contains :
- 1 folder : "AOMGold"
- txt file : "Readme+serial.txt"
And you have to start the setup with "AOMSetup.Exe" of the folder "AOMGold" as explained in the readme file.
Maybe you already have another aom installed on your computer and you probably have to uninstall it first.
The best defence is attack!