Hello Hicham,
I would recommend enabling the form DEBUG mode to see if you can review the Query.
Can you please reference pages 73, 74, and 75 of our Dynamic Forms User Guide to ensure that you're configuring this field correctly:
http://www.datasprings.com/userguid...rGuide.pdf There's several examples about the Text Suggest.
Please let me know if you have any questions.
Thanks,
Ryan