Go here and use the Registration workaround...
http://www.fsalpha.com/gmax_tips/
Jesus! It's working!!! And I found one tips: You need install gmax_1.reg in AutoDesk_GMax.zip only, and the necessary contents at the end of file in gmax_1.reg that is [HKEY_CURRENT_USER\Software\Autodesk\gmax\UserProfile]. others in gmax_1.reg is useless.
Hi.
I'm a new user of Gmax. I download it, and chek the e-mail confirmation to get my registration Code, but since 1 month, nothing...
Could you help me ?