The language combination فارسی، دری - هلندی is not (yet) available for the book "Sleep Tight, Little Wolf".
You might be lucky, though, by changing the order of these two languages. Just go back to the Language Wizard and select هلندی as first and فارسی، دری as second language:
If this doesn't help, shoot me an e-mail to enquire about the availability of the title, by clicking this link: order@childrens-books-bilingual.com
If the message doesn't open automatically in your email programme, send an email to 'order@childrens-books-bilingual.com' with the subject heading:
Availability of: راحت بخواب، گرگ کوچک (فارسی، دری-هلندی)