I have never had that happen to me before at Moneybookers. Have you changed your password since this has happened? You don't ever try to log in to Moneybookers from a link in an email do you? Even though you may think it's from Moneybookers, and the site you go to looks like moneybookers, you could accidentally give your info to a phishing site.
Change your password and make it a tough one. Don't use "MyPokerCash" as a password use something like "SU8&$h7fa7h6#$hg"