Cannot login into yahoo messenger?

if you have one ID, wherever you use it, might be in messenger or any yahoo services, you need the same ID w/ the same password. or even if you have other accounts, you log in to that specific account as long as the password is correct. but if you had reset your password with a new password, there is a tendency that the new password cannot be activated right away, hence you need to wait a couple minutes or hours to be activated. changing Yavatar is not a problem also. and one more thing, since you had changed your password, do not attempt to change it again today or the next day. wait for a week or so if you want to change another. and if you cannot log in this time, try to restart your PC. wait for a coulpe of minutes to log in again on your messenger. if problem persists, give up this time as more log ins and log outs made may cause your ID to be blocked automatically from yahoo.