Why i can't sign in to yahoo messenger. it always

To sign in to Web Messenger, you'll need to disable the Pop-Up Blocker. Follow the steps for your browser:

For Firefox:

1. When a pop-up is blocked:
   - You'll see a bar at the top of the browser window that says "Firefox prevented this site from opening a pop-up window."
   - On the right side of that bar, you'll see an Options or Preferences button.
2. Click Options or Preferences ' select Allow popups for webmessenger.yahoo.com.
3. Click Sign-in again.
   - You may need to reload the sign-in page.

For Internet Explorer:

1. When a pop-up is blocked:
   - You'll see a yellow bar at the top of the browser window.
   - You'll see a message that says "Pop-up blocked. To see this pop-up or additional options click here...".
2. Click on that yellow bar at the top of the browser window ' select Always Allow Pop-ups from This Site ' click Yes on the confirmation dialog.
3. Click Sign-in again.

For Safari:

1. You'll see a warning above the Sign-in button.
   - You won't see any other type of warning.
2. Select the Safari menu at the top-left of your screen ' un-check Block Pop-up Windows.
3. Click on Sign-in again