[lubuntu] problems to open software center

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http://ubuntuforums.org – I am a new user and i need help with software center,that i can't open. I read many messages and when i tried to open in a terminal window with the command software-center then give me this this programm is not installed. you can install it by running sudo apt-get install software-center then when i run the above command it return this E: Encountered a section with no Package: header E: Problem with MergeList /var/lib/apt/lists/gr.archive.ubuntu.com_ubuntu_dists_saucy_main_i18n _Translation-el what can i do to solve it..? i use lubuntu 13.10 (Hardware)