[Backwardsman97]

pawn Код:

public OnPlayerStateChange(playerid, newstate, oldstate)
{
    if(newstate==PLAYER_STATE_DRIVER)
    {
        if((GetVehicleModel(GetPlayerVehicleID(playerid)) == 592) && (GetPlayerScore(playerid) >= 500))
        {
            SendClientMessage(playerid, COLOR_YELLOW,"Welcome To Andromanda!");
            return 1;
        }
        else
        {
            SendClientMessage(playerid, COLOR_YELLOW,"You Need Atleast 500 Score To Enter Andromanda!");

            new string[128];
            format(string, sizeof(string), "Your Flight Score is: %i",GetPlayerScore(playerid));
            SendClientMessage(playerid, COLOR_YELLOW, string);
            return 1;
        }
    }
    return 1;
}

Try that. You had it like this.

pawn Код:

if(GetVehicleModel(GetPlayerVehicleID(playerid)) == 592, GetPlayerScore(playerid) >= 500)

It needs to be like this.

pawn Код:

if((GetVehicleModel(GetPlayerVehicleID(playerid)) == 592) && (GetPlayerScore(playerid) >= 500))

You don't have to have those extra parenthesis but it makes it easier to read.