Lua Cant sell items

[cesar10]

Hello everyone, i need some help, i cant sell any item to npcs



[7/5/2012 15:17:17] [Error - NpcScript Interface]
[7/5/2012 15:17:17] (Unknown script file)
[7/5/2012 15:17:17] Description:
[7/5/2012 15:17:17] (luaDoPlayerRemoveItem) Player not found
[7/5/2012 15:18:6] Blueh has logged out.
[7/5/2012 15:18:31] Fairy words has logged in.

thats what i get D:
PLEASE HELP :c

 

[Limos]

What kind of npc is it? if its not a normal tfs npc, can you show the script?