Not able to discovery Amcreat and Foscam IP cameras

[pmuvva]

I am working upnp discovery for IP camera's (Amcrest and Foscam). I downloaded the source code from here.

1. First I build libupnpx.a static library by using upnpx.xcodeproj

2. Add the libupnpx.a to upnpxdemo.xcodeproj

3. After ran demo project it is not discovering AMCREST and FOSCAM IP cameras. Both the camera's UPNP is enabled

Any input is appreciated why it is not discovering those two IP Cameras's but it is discovering HIKIVISION IP camera