World Adventures: Regional Code? Help!

I have all the games up to Seasons except for World Adventures.

When I go to the installation for the game, it immediately pops up with:

"The setup had dectected that the regional install code for The Sims 3 is different then what this expansion requires.

This product requires The Sims 3 to have the same regional code in order to be installed."

& then once I click ok, it just disappears and keeps appearing with the same messagae everytime I try to open the setup!


I've also tried these directions:

2. Now open the Start menu. Type 'regedit' in the search box and press [ENTER]. Navigate to:
HKEY_LOCAL_MACHINE\SOFTWARE\Sims\The Sims 3 and double-click on 'SKU'. Change the shown
number to 2 and press 'OK'. Close the Register Editor......

but when I open my registor editor it doesn't have the sims folder. It just has HKEY_LOCAL_MACHINE\SOFTWARE\Electronic Arts/ Sims3 and theres no SKU shown when I navigate to this! I have Windows 7.
Please Help!

Try here. HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Sims\The Sims 3

Thank you!

I found the SKU that way & changed it to 2 and now I'm gonna see if it will install!