Highlights and bookmark lost.

I lost highlights and bookmark from an ebook I've been studying since about twenty days.

Today I find only those one I made yesterday... It's terrible!

I'm very upset: Adobe Digital Editions don't work very well (instead of the usual "reader" that don't give me problems ever): I can't change color of highlight, not possible to make underscore and so on...

Today the worst surprise: lost the most part of my work...

And because of DRM I can't use the ebook I bought with another device!!

Someone has suggestion how to find my work?

I'm using ADE for iOS (with an iPad device)