HookScript after SetScript not working?

[Lybrial]

Hi,

I thought Ace HookScript function would hook on any script and first process the handler
and after that the original function.

How ever when I do the following:

self.frame:SetScript("OnEvent", function()
    print("original function");
end);
 
self:HookScript(self.frame, "OnEvent", function()
    print("hooked function");
end);

"original function" will be printed but "hooked function" wont ever be printed.
So whats the thing about that?