Solved CanHackCrate hook not working (as expected?)

Code:

bool CanHackCrate(BasePlayer player, HackableLockedCrate crate)
        {
            SendReply(player, "Started hacking");
            return true;
        }

Code:

bool CanHackCrate(BasePlayer player, HackableLockedCrate crate)
        {
            SendReply(player, "Cannot hack");
            return false;
        }

I expect returning true will start hacking the crate but it doesn't?

Edit: changing to object and returning null to allow seems to do the job