Dinja's quest

[Neron]

Guys, heres my doubt:

I went to Orc Caves, got Dinja's Quest, got it complete (5 crystals within the book), and came back to her. She didn't do anything when I got near, so I tried saying "Hello" again. She gave me another book.
Coming near here, speaking to her, dragging the book to her, double or single clicking her - none of it will end the quest.
What am I doing wrong here?

[Edit]
Got the solution from +Veritas. It was a momentary problem, and returning to her afterwards, it worked. But as I had another book, I had to destroy it first, though.

[TribalInstincts]

I also just encountered this issue. Logging out and back in resolved it.