First of all ISBN what you use in BookLibrary must be without any blank sings at start and at end.
Do you set all three parameters for Amazon server ?
Can you try set default parameters for amazon server - and check work some thing or not?
If that not help can you send through "Contact Form" http://ordasoft.com/Contact/category/?catid=0
yours sit or yours demo site supper admin account and we will try check where error.