How To use AV-In
 

I bought this MP4-Player with AV-IN/OUT from E-Bay.
It's not 100% the same, so I uploaded some fotos here:
http://www.uni-ulm.de/~s_shoer1/pic/mp4player/ There is hand writen: L13 26 R (or L13 zG R, not easy to read the hand writing)

Now, I tried to use the AV-In for recording video, but there is no function in the menu for this. AV-Out works perfectly, I go in the video player menu and coose in submenu my prefered video output. So I wrote to the dealer, and he said that in "DV" menu i can record AV, but there I can't coose any recording source. It's very strange too, that the video signal is on red wire, and not on the yellow when I use AV-Out. Does anyone knows this player and can tell me how I get this AV-In recording function?
How can I find out, which chipset is used in this player? Mybe I have to update the Firmware to get the AV-recording function.
Best regards,
Stefan

Does no one knows something about this player?