This document explains what to do when you can't sign in to Yahoo! Messenger.

There are many possible causes for sign-in difficulties. Please use the following troubleshooting steps to resolve your issue:

• Step 1: Test Your Internet Connection
• Step 2: Verify Your Yahoo! ID and Password 
• Please click here to download and install the latest version of Yahoo! Messenger  -  Note: Our engineers report that this new version has resolved the sign-in issues that many customers experienced in older versions of Yahoo! Messenger. Upgrading may resolve your issue as well. If you've installed the latest version of Yahoo! Messenger and are still having trouble signing in, there are several things you can try to get Yahoo! Messenger up and running again. Please use the following pages which list possible problems, along with suggestions to verify or resolve some of the issues you may be experiencing:   
• Step 3: Test Your Access to Secure Pages
• Step 4: Verify Credentials
• Step 5: Check Connection Settings