Video Card, Dual Display and video distribution

I have been running into a problem that i wonder if anyone has an answer to. When i plug my svideo output into a video source i can set the svideo as a second monitor for my pc. If the svideo is plugged into a video distribution amp and then into a video source the svideo shows up as 'no device connected'. i can bypass this by plugging the svideo into a video source and setting the video source as a second display and then unplugging the video source and adding the distribution amp in between. I want to know if there is either 1) a way to set the svideo as a second monitor without all the hassle with the cables or 2) if there is a distribution amp that is capable of being picked up as a video source?

Any help would be greatly appreciated.