[EiresJason]

Do you have a switch?

pawn Код:

switch(listitem)
{
    case 0://code
    case 1:ShowPlayerDialog(playerid, DIALOG_Sub, DIALOG_STYLE_LIST, "Sub Machine Guns", "$1000 - UZI\n$1000 - Tec-9\n$1500 - MP5", "Select", "Cancel");
//Edited as you had the closing bracket but no opening bracket.

}