Ok, thanks, so i've managed that and now i can read pdf and the other formats that pocketbook supports, but still some issues. I have some books with tables, grafics and so on in CHM format. The device opens and manages with CHM format very good, everything is there, it's readable, but after 5 mins of reading it freezes, and needs a reboot. It's very annoying problem, have someone else jumped into it and now how to solve it? Thanks in advance.