Troubleshooting Librerator Grey Screen Problem

[fabgonber]

Hi All,

I have a Kindle DX (Serial B005...)With Stock Firmware 2.5.8, and Librerator R2 installed in it.

My problem:
1) I open a pdf with pdf reader
2) I'm happy reading it
3) I highlight some part of the text, the screen become grey... and i cannot read this book again. all pages are grey now (close the pdf, close librerator, reboot kindle is not a solution, i see only grey pages when i reopen the pdf).

More information:
When i try open another pdf, i can read the new book without problems,
When i open the grey problem pdf (without see anything) and i try to add other higlight something, i see this error: No visible text.

Ideas to help me?
a) rename the file? librerator will take it as a new pdf?
b) delete some file with history of my pdf in librerator?
c) anything else?

Thanks for reading and comments.