I am not able to view my sent messages in Yahoo Messenger and also not able to view others messeges sent to me. pls slove this problem
To do this, you have to set it to save your messages under Preferences. First, go to the main Yahoo window, the one where you see all of your contacts and click on Messenger. Look through the list until you see Preferences. Click on Preferences and look under the category list for Archive. You have three options there, to save all messages that you send and receive, to save them but to delete them upon exiting the program, or to not save them. The first option is the one to choose if you are wanting to save ALL of the messages you have sent and received from your contacts. Remember to hit the "OK" button when you've finished making your changes.
If you are just wanting to see the most recent messages you've had with someone, open up a chat window, and without typing anything to them, click the F3 button that is at the top of your keyboard. It won't show your entire conversation history, but it will show a fair amount of your most recent conversation. If you're wanting to know what date and time the conversation took place, click the F2 key, also at the top of the keyboard. You can use that key at any time during a conversation to turn timestamps on or off.
There is no way to retrieve past conversations, unfortunately, but if you choose to save messages to archive, you'll be able to view conversations at any time you wish.
I hope this helps you.