Not instantly but after we conversated and logged out after sometime when I log in then if I want to read all previous conversation then how would I able to read it in that messenger ? Tell me :confused:

You have to have message history enabled. If you don't know about message history, then you probably don't have it enabled.

P.S. you can reply to me through this thread. Just use the box down below this post. :)

To enable the message archive, go to "Messenger", then "Preference", and in the left column click on "Archive". From there you can enable the message archive. :)