Jailedbreak my Kindle paper white, opened most but not all my epub

[Xellos2099]

I got a small problem. I bough myself a cheap used kindle paper white from ebay and i got it last night. I went ahead and jailbreak it and put in the epub reader. It read most of my epub light novel but some of them refuse to open. It is like the kindle try to open it but it fail and jump back to the menu. Any idea what cause it?

 

[Dulanic]

So I can't answer this for you as I have never tried to, but why even do that? I just send everything to mine through email using calibre. No issues at all.