If you have a login username and a valid password, but you are still unable to login, it could be something simple but easily overlooked.
Please check the CAPS LOCK setting on your keyboard to be sure that you are entering upper and lower case letters correctly, as passwords are case sensitive. If using a laptop or keyboard that does not have a separate numeric keypad, please also check the NUM LOCK setting.
You may receive a more specific error message if your login fails - if so please note it down to allow help your System Administrator to resolve the problem quickly for you.