trunk/npc/re/mobs/fields/bifrost.txt
bif_fild02,0,0,0,0 monster Miming 2137,30,0,0,0
make sure you have the database for 2137....
trunk/db/re/mob_db.txt
2137,MIMING,Miming,Miming,140,81200,1,7100,6300,1,430,652,120,120,90,66,105,77,133,77,10,12,0,0,20,0x3885,250,576,1140,504,0,0,0,0,0,0,0,6394,5000,7938,100,969,1,2853,3,0,0,0,0,0,0,0,0,0,0,4510,1
and please alway check your map server.....there should be some error message if your script didnt work properly ....