How to get data that i already locked after formatting?

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Hai lotters, Am in big trouble now.I uses file locker 6 software to lock some important data.Because of virus attach, am forced to format windows xp. but i copy the lock folder which is shown as a locker icon which contain the same size of content of data.After formating i instal the same software and try to access tha data.The result is that, i can open the data folder.Also it shows all the file that i have.But when i try to open it,i cannot.. Any one pls help mee