Darin and Roxxy don't open the dialog box. Nothing happens when you click on them. No any info in GameServer window

LATER FIX:
I added in the constructor:
addFirstTalkId(DARIN, ROXXY);
I added in onFirstTalk(...) cases for:
Darin (33748) and Roxxy (33749), with the same logic as in onTalk (cond 19/20 + darin_npc_check / roxxy_npc_check variables), so that the dialog is also opened in the instance (where the client sends FIRST_TALK).
addFirstTalkId(MYSTERIOUS_DARK_KNIGHT);
onFirstTalk → if you are in cond 21, it shows you 33751-01.html
onTalk for 33751 → also 33751-01.html (instead of 30031-01.html)
It works for me. Someone check and make adjustments if necessary.