Smart DJ mix unavailable/disappeared

[bloodyhippo]

Hello guys, I'm new here...I stumbled across this forum while searching for a solution to my (strange) problem.
The thing is, the Smart DJ mix option has disappeared altogether from my Zune software...I use software version 4.2.202.0 on windows 7 x64. The option used to be ther in my previous installations of zune, but not in this one. I've tried reinstalling several times, from different sources(zune site and microsoft's complete zune package, around 430 mb) but no luck. The same installer, when used on a different computer, has the Smart DJ mix feature enabled. Also, in the settings page, the "Accounts" tab is absent.

I can't find any instance of this happening to anybody else on the internet. Any help would be much appreciated.
[EDIT: I changed my computer's location to USA and now it's all here.]