Why I can add wanted item with ASIN number from AMAZON?

I love flash wizet from here and it's very helpful for control my wish list than amazon or other shopping web site.

But I couldn't add item through ASIN number from AMAZON. examp like this

Jazzamor album (ASIN number: B000QZY7HQ)

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Why?

It doesn't support adding mp3 music from amazon yet unfortunately you have to add the equivalent cd version.