Dude,
ONE post for a problem...it's common etiquette on all forums. You commented on SEVEN previous posts, asking the same question. Wow!
Anyway, to hopefully answer your question (I think there was only one), your 2 IP cameras do not have the same IP address (URL) on the same network...that would create an IP address conflict, which would cause neither to work (I'd assume). Your url has 2 parts: the camera's IP address (bolded in following example), followed by a slash and file information, such as http://
192.168.1.100/video.cgi. The URLs will be the same (since you're using 2 identical cameras), with the exception of the IP address at the beginning.
If you discover that the 2 cameras do, in fact, have the same IP addresses, then you need to change the IP address of one of the cameras so you can access both of them. Below are examples of 2 URLs for 2 identical foscam cameras:
http://192.168.1.100/video.cgihttp://192.168.1.101/video.cgi