IR Lock Precision Landing Issue

Hello everyone! May i check with you all on what’s are the factor that will result in the IR Lock and Pixy camera being unable to communicate? I had followed the parameters as shown in here: and . I had also ‘Restore default parameter values’ after uploading new sensor firmware. Thus i was thinking if will the data out port on the PIxymon affects the ir lock loiter and landing. As i had done the configuration on the mission planner already but the mission planner log display ‘0’ on the Heal.