Hello Kamyar,
I just wanted to confirm that you did follow this very important step, copied below from page 5 of the LM96511 user's manual:
LM96511 Ultrasound Receive Analog Front End (AFE) Evaluation Board User’s Guide
"7. Please do not update this WaveVision5™ software after installation and ignore any update messages!"
If not, we recommend that you uninstall and reinstall theLM96511EVK-SW software (in a new directory) and make sure you do not update.
Please confirm.
Regards,
Hooman