FatimAlj,
Have you verified that the EasyVR Shield works with the Arduino board outside of LabVIEW?
Also, because LINX was not developed by NI, we cannot provide support for that library. You may want to post in the LINX forums, if you haven't already, as they will have more experience with that library and will be able to help you better than I could. I've attached the link below:
LINX Forums
https://www.labviewmakerhub.com/forums/viewforum.php?f=12
Please let me know if this helps!
Patrick O.
Applications Engineering
National Instruments