Does anyone know why you cannot record of TV

[nec1912]

Okay I got a DVD recorder to record of TV no luck at all.Here is how it is set up.

1.I have composite cable going from DVD to the TV
2.main cable comes in from the street to the set top box in jack
3.I have a other cable going from the cable out jack on the set top box to the DVD recorder cable in jack
4.HDMI going from the set top box to the TV.


Note it is a HD set top box.

The cables are simple coax cables.

But it will not allow me to record it saying copyright and the DVD recorder will shut down.

Some one was saying this is do to CGMA-a that's causing the problem.On wikipedia it is saying this.

Copy Generation Management System - Analog (CGMS-A) is a copy protection mechanism for analog television signals. It consists of a waveform inserted into the non-picture Vertical Blanking Interval (VBI) of an analogue video signal. If a compatible recording device (for example, a DVD recorder) detects this waveform, it may block or restrict recording of the video content.

It is not the same as the Broadcast flag, which is designed for use in digital television signals, although the concept is the same.[1] There is a digital form of CGMS specified as CGMS-D which is required by the DTCP ("5C") protection standard.

But I still do not understand this or how this works and who is putting this on.

I also hear you cannot tape any thing of HD at all.