I strongly encourage you to put an SD card in the camera. It is the only way to truly troubleshoot and see what the camera sees as it relates to the IVS rules. As an alternative, you could screen record the live camera GUI as someone walks by so we can see the box around the person and what the camera is or isn't doing.
Have you dialed in the settings? That appears bright - maybe there is a ton of light and IR there, but it looks like default settings. There needs to be more contrast so that the object sticks out.
Change it to enters and exits.
That is a tight view, drop the target ratio to 30 until you get this tracking.
@bradner - the 49225 and 49425 do not have the Intelligence tab like your SD6 or SD5 has. The 49 series has it worked into SmartIVS.