NPC não responde ao comando "HI"

<?xml version="1.0" encoding="UTF-8"?>
<npc name="Ziraldo" script="default.lua" walkinterval="0" floorchange="0" speed="0">
<health now="150" max="150"/>
<look type="1419" head="10" body="15" legs="20" feet="25"/>
<parameters>
<parameter key="message_greet" value="Olá amigo! Você está aqui para ver as minhas ofertas? Vamos lá, {trade}!"/>
<parameter key="message_farewell" value="Good bye!"/>
<parameter key="message_idletimeout" value="Good bye!"/>
<parameter key="message_walkaway" value="Good bye!"/>
<parameter key="module_shop" value="1"/>
<parameter key="shop_buyable" value= "metal coat,12232,5000000;
ancient stone,12244,5000000;
earth stone,11451,1000000;
water stone,11442,1000000;
leaf stone,11441,1000000;
heart stone,11453,1000000;
thunder stone,11444,1000000;
coccon stone,11448,1000000;
rock stone,11445,1000000;
crystal stone,11449,1000000;
darkness stone,11450,1000000;
enigma stone,11452,1000000;
fire stone,11447,1000000;
venom stone,11443,1000000;
ice stone,11454,1000000;
punch stone,11446,1000000;"/>
<parameter key="shop_sellable" value= "metal coat,12232,2500000;
ancient stone,12244,5000000;
earth stone,11451,800000;
water stone,11442,800000;
leaf stone,11441,800000;
heart stone,11453,800000;
thunder stone,11444,800000;
coccon stone,11448,800000;
rock stone,11445,800000;
crystal stone,11449,800000;
darkness stone,11450,800000;
enigma stone,11452,800000;
fire stone,11447,800000;
venom stone,11443,800000;
ice stone,11454,800000;
punch stone,11446,800000;"/>
</parameters>
</npc>