Unable to log in via website.

Today, my sister had tried to log into Maple via the website so she could buy some NX using google chrome, but it says that the ID/Password is wrong. She tried it with every combination of password it would be , but it didn't work. She was already logged on Maple through the launcher at that time. I then tried on my own computer with FireFox 4, with maple open as well, to log into her account on my own computer - only to see another failed attempt. I still have maple open and I have just tried to log into my account and it says that has failed as well, and I tried one of my mule accounts, and that failed.
Has this happened to anyone else? Do you know any solutions?