Try putting it in Program Files\ Electronic Arts\ The Sims 3\ GameData\ Shared\ NonPackaged\ Worlds or your equivalent install directory.
thank you! Thank you very much ^__^ It's working! You just totally save my day
( and sorry for being such a silly histerical technophobe
) and wow this island is truly great! indeed a tropical paradise






) although I still search for a little smaller world for a change
when I click on .sim3pack file on launcher it's showing message "Requires software update - please make sure your game has the latest software update" And I've got WA and all patches update
I've got installed Riverview and Victorian Bay Neighborhood by ruthless_kk and they work... maybe three worlds is too many? Can anyone please give some advice?