Problem with HKLM & Wow6432Node

HI everybody!!

My app require to write a key in:
HKLM\Software\Appname\Key

I write it with:
[RegistryKeys]
AppName=HKLM\Software\AppName

In a 32bit enviroment all is OK.
In a 64bit environment not work.
Because the launcher not store in:
HKLM\Software\Appname\
but only in
HKLM\Software\Wow6432Node\Appname\

How can I solve?

Thanks