[iOmar]

In$$ane there is something is not valid...

pawn Code:

new vehicleid = GetPlayerVehicleID(playerid);//variable to get vehicle ids
    if(GetVehicleModel(vehicleid) == 425 && gPlayerClass[playerid] == PILOT)//if player is pilot
    {
        SendClientMessage(playerid, COLOR_RED, "You Need to  be a Pilot to fly Hunter");//messages goes to the player that he can't drive the hunter
        RemovePlayerFromVehicle(playerid);//get u off from the hunter
    }

This will remover pilot from hunter not other classes.
This should be this:

pawn Code:

public OnPlayerEnterVehicle(playerid, vehicleid, ispassenger)
{
    new Float:PosX,Float:PosY,Float:PosZ,model = GetVehicleModel(vehicleid);
if(model == 425)//Hunter
    {
        if(GetVehicleModel(vehicleid) == 425 && gPlayerClass[playerid] == ASSAULT)
        {//then
            GetPlayerPos(playerid,PosX,PosY,PosZ);//getting player pos
            SetPlayerPos(playerid,PosX,PosY,PosZ);//setting player to same pos to avoid entering vehicle
            SendClientMessage(playerid, 0xAA3333AA, "ERROR: You Need to be Pilot to Fly Hunter!");
        }
    }
    if(model == 425)//Hunter
    {
        if(GetVehicleModel(vehicleid) == 425 && gPlayerClass[playerid] == SNIPER)
        {//then
            GetPlayerPos(playerid,PosX,PosY,PosZ);//getting player pos
            SetPlayerPos(playerid,PosX,PosY,PosZ);//setting player to same pos to avoid entering vehicle
            SendClientMessage(playerid, 0xAA3333AA, "ERROR: You Need to be Pilot to Fly Hunter!");
        }
    }
    if(model == 425)//Hunter
    {
        if(GetVehicleModel(vehicleid) == 425 && gPlayerClass[playerid] == ENGINEER)
        {//then
            GetPlayerPos(playerid,PosX,PosY,PosZ);//getting player pos
            SetPlayerPos(playerid,PosX,PosY,PosZ);//setting player to same pos to avoid entering vehicle
            SendClientMessage(playerid, 0xAA3333AA, "ERROR: You Need to be Pilot to Fly Hunter!");
        }
    }
    if(model == 425)//Hunter
    {
        if(GetVehicleModel(vehicleid) == 425 && gPlayerClass[playerid] == JETTROOPER)
        {//then
            GetPlayerPos(playerid,PosX,PosY,PosZ);//getting player pos
            SetPlayerPos(playerid,PosX,PosY,PosZ);//setting player to same pos to avoid entering vehicle
            SendClientMessage(playerid, 0xAA3333AA, "ERROR: You Need to be Pilot to Fly Hunter!");
        }
    }

    return 1;
}

This will remove all except pilot class member...

==> And one more thing i am not understanding your spy system..... Can u tell it clearly?