disable chat book history on facebook

dear friends..
i have got a problem from last few weeks... i a geting facebook chat history on my message box of eac of conversations form each of friend i do chat .
can any one help me on this.. to know how to disable that n from where....pease please...
help

vijay

Moved from General to Facebook Support other problems

That's not a bug, it's one of the new message system's features that allows you to save your chat history. It can't be turned off, unfortunately.

From Chat room

[11:00:53 15/02/11] [You must be registered and logged in to see this link.] : hallo
[11:00:57 15/02/11] [You must be registered and logged in to see this link.] : anyone there?
[11:06:48 15/02/11] [You must be registered and logged in to see this link.] : dear sir
[11:06:53 15/02/11] [You must be registered and logged in to see this link.] : please help me
[11:07:00 15/02/11] [You must be registered and logged in to see this link.] : u there?

Why are you seeking help in the Chat room which is checked for 'misuse'

No help is given in there so please do not ask for it