[Donor Room script help]

Im trying to make a donor room. There's an error. only gm accounts can enter here. I want to make it gm level 1 and above can enter or access in this room. i need you help guys. thanks. this is my codes - 

prontera,164,171,4    script    Donor Room    899,{
//Settings
    set .@map$, "job_ko"; // Change to wherever your gm post is
    set .@mapx, 123; // X coords
    set .@mapy, 123; // Y coords
   
    if (getgmlevel() >= 1) { goto requested; end; }
    else { goto nondonor; end; }
OnInit:
    waitingroom "Donor Room",0; // Uncomment to enable a waiting room
    end;
gmwarp:
    mes "[^0000FFDonor Room^000000]";
    mes "Hello "+strcharinfo(0)+".";
    mes "Do you wish to go to the Donor Room?";
    menu "Take me there.",yes,"Maybe later.",no;
yes:
    warp .@map$,.@mapx,.@mapy;
    end;
no:
    next;
    mes "[^0000FFDonor Room^000000]";
    mes "Alright, take care.";
    close;
    end;
nondonor:
    mes "[^0000FFDonor Room^000000]";
    mes "I'm sorry but only Premium Accounts can enter here.";
    close;
    end;
requested:
    mes "[^0000FFDonor Room^000000]";
    mes "Welcome to Donor Room!";
    next;
    mes "[^0000FFDonor Room^000000]";
    mes "You may go in now.";
    close2;
    warp .@map$,.@mapx,.@mapy;
    mapannounce .@map$,strcharinfo(0)+" has entered the Donor Room upon request.",0;
    end;
}

 

[Game sometime crashes entering a map, randomly.]

having the same problem bro until now