//Put this script OnOpen
void main()
{

object oPC = GetLastUnlocked();

if (!GetIsPC(oPC)) return;

if ((GetLevelByClass(CLASS_TYPE_ROGUE, oPC)==0))
   {
   SendMessageToPC(oPC, "You may not pass!");

   ActionCloseDoor(OBJECT_SELF);

   SetLocked(OBJECT_SELF, TRUE);

   }
else
   {
   SendMessageToPC(oPC, "You may pass.");

   }

}