why can't i sign in into Yahoo Messenger??? Help Please?

Me too! I think it's the server updating or working on it. I've read several answers in Yahoo! Answers and I think it should be up and going soon.

Try completely exiting, wait a few secs and then sign in. That has worked for me a couple of times (not all times like now). Also check your connection preferences on your IM.

I think we are just going to have to be patient for now. Good Luck!

There are few possibilities:

1) Your user id and/or password is wrongly typed (check your capslock button)

2) Your internet connection is 'offline' -check connection status.

Me too, I can't get into my mail either, going on 2 days for me. YAHOO IS GOING DOWN THE TUBES! HOTMAIL HERE I COME!

ummm are you sure its the correct user name and password?

make sure the cap locks is off

other than that i dont know what else to tell you

idk i cant either :( sorry im no help.... its sux