For Poland, so if you're polish click here and enter to contests.
If you aren't polish you need proxy like: ukryj.info and when you go there paste it in bar: http://www.stardoll.com/en/contest/view.php?id=1023 and click 'go' or something like it. Then log in, change URL: http://www.stardoll.com/en/contest/finish.php?id=1023 and log off, leave proxy.