[SilverKiller]

pawn Код:

SendClientMessage(playerid, "You loaded your truck !")

Replace this line with this:

pawn Код:

SendClientMessage(playerid, COLOR_GREEN, "You loaded your truck !");

And replace the dialog things with this:

pawn Код:

if(response)// They pressed the first button. 
    { 
    switch(dialogid, 2) 
        { 
        case 1:// Our dialog! 
            { 
            switch(listitem)// Checking which listitem was selected 
                { 
                case 0:// Weapons 
                { 
                    SetPlayerCheckpoint(playerid, -322.9266,821.1814,14.2874, 5.0); 
                    SendClientMessage(playerid, COLOR_YELLOW, "You have loaded some Weapon crates.)"); 
                } 
                case 1: // Liquor 
                { 
                    SetPlayerCheckpoint(playerid, -182.8844,1034.1738,19.7422, 5.0); 
                    SendClientMessage(playerid, COLOR_YELLOW, "You have loaded some Liquor crates."); 
                } 
                case 2: // Potatoes 
                { 
                    SetPlayerCheckpoint(playerid, -142.8067,1222.1426, 5.0); 
                    SendClientMessage(playerid, COLOR_YELLOW, "You have loaded some Potato crates ."); 
                } 
            } 
        } 
   } 
} 
return 1;

and tell what you get..