Unable to activate Find my Mac

hi,
how can I activate Find my Mac ??
in System Preferences - iCloud, I can check the option.
after that there is a question about the use of my location, which I do allow.
next thing, the option Find my Mac is unchecked again.
the functionality of Find my Mac, depends on the presence of a recovery partition, which I do have.
actually, I have two of them, one for Mavericks and one for Lion, which is on a seperate partition.
is this causing the problem ??

Hey fred44nl!
Try using this article to help you troubleshoot this issue with Find My Mac:
iCloud: Troubleshooting Find My iPhone, iPad, iPod touch, or Mac
http://support.apple.com/kb/ts4006
Thanks for being a part of the Apple Support Communities!
Regards,
Braden

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    The new "possessor" does not need to erase or reinstall. All he needs to do is boot to Recovery HD (single user mode for OS 10.6.8 or earlier), and reset the password–> http://osxdaily.com/2011/08/24/reset-mac-os-x-10-7-lion-password/
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