can't load cc-mode

[<ya...@th...>]

I have downloaded and installed the cc-mode from your site 
and I get the following messages when I try to open a .C file:

Loading cc-mode (compiled)...
Loading easymenu (compiled)...
Loading easymenu (compiled)...done
File mode specification error: (error "Autoloading failed to define function 
easy-menu-do-define")

Could you please tell me what is wrong?

Thank you in advance,
Yakov Nekrich