access to email on my ipad air

I am unable to access my email on either my iPhone six or my iPad air. The iPhone six gives me a message saying that the password for the IMAP is incorrect. On my iPad the error message says that there is no password provided for AOL. I do have Internet access on both devices. The Apple software on both devices is current. I do have access to my email on AOL on my personal computer. I created a new email password for AOL. This new password works fine on my personal computer but obviously does not work in my iOS devices. This problem started about 24 hours ago. Prior to that time I had not changed my email passwords in quite some time. What should I do?