It seems there are work-a-rounds for the problem with 64bits registry

What is your environment?

I ask, because I have the 64 bit version of ActiveState Perl 5.16.2 installed on Win7 x64 and Win2012 x64 and the code I posted just works, no fixes or workarounds necessary. (and no, the 64 bit version of Windows does not have multiple registries, that would actually be insane. What it does is store entries from 32 bit apps in alternate subsections of the registry, such as the Wow6432Node folder)