Q: IP Camera Tool shows error information “Subnet does not match, dbclick to change!”

 Normally, it is the reason that router cannot give the camera an ip address automatically. You can set a fixed LAN ip for the camera. When you set its ip, please keep the camera and your router or PC in the same subnet, in other words, keep the first three section of IP address the same. Please refer to How to set a static IP address For MJPG camera? to set IP address for camera.