Vivlio Inkpad 3 cant read ebook from ADE 4.5

I have bought 6 ebooks online, and I have imported them in ADE 4.5, I can open them in ADE, but when I transfer them on my E-reader, I cant open them from it. My e-reader has been authorize, and some other book transfer from ADE works, but the last 6 I bought wont open. There is no error message, the book is just blank, or with no page. Any idea ?