How do I create a new Yahoo screen name if I already have one?

I have more than one account on Yahoo and when I download the new messenger it only allows me to use one, why?

• I have been having problems changing my photo on my Yahoo profile, when I try to I get an error message saying it can't be completed at that time. It may be related to the problems I've been having with the new Yahoo Messenger. I downloaded the new version a few weeks ago and it seemed to work fine but I use more than one messenger account on this computer and I found that when I first signed on under one name, it worked, but then when I tried to use any of my other screen names I got the "New User", "Sign-in problems" or "Try Again" message. I then had to go back to an older version of Messenger but I've found that when I try to create a new ID I'm being told that I'm not entering the code correctly everytime I try. I thought it might be a virus, but I just bought new Anti-Virus software. I tried signing out, deleting all the cache files, reinstalling the new messenger and still it didn't work. I have no idea what might be wrong, can you suggest anything?

• Answer:

  The new messenger has been giving everyone problems, in your messenger, go under help and then report your problem to yahoo , i think they might be able to help you, if logging in with one ID and everything is ok, there should not be a reason you can't log on with the others , maybe also you could check your proxy