How do Mario Kart DS cheats work?

I have and Acekard2i with AKAIO 1.7.1. I turned on unlock all courses, all characters, cars, and class. I also turned on each gold trophy cheats for each grand prix. All characters except R.O.B. is unlocked even though the cheat say's all, and none of the races have a gold trophy even though I turn on the gold cheat for all of them. Can anyone help?
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Ok I was able to get the gold trophy part working and all of them have 3 star. Still don't have R.O.B. though and I was wondering if there was a way through these cheats to get the alternate title screen?
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I just realized the cheats doesn't unlock the last cups in the nitro and retro grand prix in mirror mode. How do you unlock those?

Replying to #1

you beat da game is what ya do.

go to settings and put the cheats on.

I said already I put the cheats to unlock all tracks and characters but it still doesn't unlock R.O.B. or the last 2 in cups in mirror mode!

Can anybody help?

cheats fro rob end cups arent working in my m3real so you must just end by yourself 150cc or 100cc to unlock him.