You need to supply more detail about the cabling set-up.
FWIW, I have an ntl digital box. It connects to the VCR via SCART. On the VCR, aside from the standard channels, there are 'channel settings' for SCART 1 (L1) & SCART 2 (L2).
If I want to record from digital box to VCR, I set the VCR timer to the digital box SCART channel (e.g. L2) for the appointed time. I then have to set an auto-tune reminder on the digital box, consistent with the VCR timing.
I accept your set-up may be different but, in principle, it should work the same.