Please be specific with your problem. A general statement can mean so many things. You have a forum account which is the website and you need to create a game account through the website. Once you make a game account, then you will be able to login. Please use this Ashita to login
https://na.nasomi.com/software/Ashita.zip If you have a character already made and still not able to login. Your username password are incorrect, or you been hacked who knows. Try to get help at nasomi.net you will have to wait for a few hours to get a response. from 0 - 4 hours hopefully. Most people will be in game.