Error when try to login cpanel

[ratt]

i get this error when i try to log in my cpanel. "Invalid License File" what does that mean???
thanks for your reply and help

[compunet2]

If you have a valid license, you'll need to contact cPanel - http://www.cpanel.net/contact.cgi or fill out a trouble ticket at: http://www.cpanel.net/support/index.htm