Getting stuck while collecting reward from unity npc

Platform: windows7
ISP:
Type of Internet Connection:
Internet Connection Speed:
Date & Time:20 february 2015 13.00 GMT +1
Frequency:always
Character Name: Kyuichichi
Race: tarutaru F
World: Ragnarok
Main Job: Thief 99
Support Job: Dancer 49
Area and Coordinates: Windurst Woods J-10
Party or Solo: solo
NPC Name: yonolala
Monster Name:
Steps:
1)I traded to Yonolala Vedrfolnir's Wing x50 and a jugo kukri
2)When I talk to her to receive the reward I get stucked. The only way is to force the shoutdown.