Another thing to try - on the basis that there is some ONVIF compatibility:
With the camera and notebook all plugged in to the LAN, at a command prompt use 'ping' to confirm a response from the IP address you have for the camera.
Install the very good Windows open-source tool 'ONVIF Device Manager' from sourceforge.net
This will query your camera, and should show lots of useful detail, eg
Actual ID, assuming it's not a real Foscam, on the Identification' page.
Live Video.
Camera web page including the admin URL and the web GUI port.
RTSP URL, at the bottom of the Live Video page.
ONVIF port, in the URI at the bottom of the Identification page.
All of which should be useful in figuring out what the problem is.