Try loggin in with your user id (not the email)
chopin.x10hosting.com:2082
chopin.x10hosting.com:2083
Else login to the x10hosting.com/control using email id and password and then hit the " view details" for your hosting account and then it opens this page "https://x10hosting.com/control/?hosting&u=" where you will have an option to hit "Go to cPanel"
Revert back if you still face a problem.