[Byrner]

That code fixed one of the problems.
It set the backpack to 0 ... but still didn't give the player the money in his bank account.

Then this code got it working:

pawn Code:

BankCash[playerid] = dUserINT(PlayerName(playerid)).("bankcash");
    new Total = HasPackMoney[playerid] + BankCash[playerid];
    dUserSetINT(PlayerName(playerid)).("bankcash", Total);
    dUserSetINT(PlayerName(playerid)).("HasPackMoney", 0);

Thanks alot for your help m8.