Sorry the title should be "CANT update hack to sever"

Ok Im just going to use this as a general example, when changing a value in a game thats online. Say im changing the value of gold in a game. Value=100 . And I change that value to = 10,000,000.
In my inventory it says I have 10,000,000 Gold. But I can't buy anything with that. Cuz it says I don't have the funds.
So how do I make the game think that I have 10mill gold. I've tried this on a number of games.
And I can always change the value. And the value will show in game. But I can't use it.
Do I have to make the server think I have the gold?

I don't understand what im doing wrong

Thanks for any help on this!
And next I want to learn how to expand this to CA. But so far can't get past the damn Hshield.