Topic: Problems with Ladybird BookZ

I got the nabaztag sepcifically for the Ladybird tales books with the ztamp that will read aloud the stories.
Unfortunatley, I can only get the bunny to detect the ztamp - occasionally.  I put the ztamp close to the bunny's nose, sometimes move it around, and nothing.

Is anyone else having this problem with the books? I can't find help anywhere on this one.