I'm assuming that your computer is behaving well in all other aspects of its operation.
Are these the only two "sign on" accounts you have in cyberspace?
If there are others, are they OK?
Check for caps lock <on> (very easy to hit this by mistake when using the LH shift key if you have big paws like mine).
Ditto for Num Lock if you are using this for the numerals in your user name or password.
Some remote sites will lock you out for x minutes if a certain number of failed log-on attempts is exceeded. Have a beer - or several. Things may become more clear with a few minutes away from the wretched device.
Persist. I very much doubt that problem is at the remote computer.
