Ip Camera won't work wireless

I set up a wireless Foscam camera by using the ethernet cord to the Time Capsule. Everything was working fine. I could see if in an icam

application and could see it off the website. I unplugged it and the camera took about a minute to connect to the Time Capsule/airport wifi. However when I moved it twenty feet away, the camera would not hookup. On the website I got a "socket error" alert. After that, the camera would not work off wifi. I do plug it back on the cord to the router, and it works fine.

Has anyone had any such problem? And what is a socket error?