Thank you for using the forums. To be sure I understand correctly, which password are you trying to reset? Is it saying the administrator password is incorrect or your login password?
To change your login password, on a computer you would simply press the login button and then enter your email where it says forgot password, and then follow the steps on the screen. If it is asking for the administrator password, you would want to follow the steps in the article listed below.
Hope this helps,
The Sling Moderation Team