On first look, it doesn't seem you're doing anything wrong.
Since the BB DECA has a blinking cLink, then the coax it's connected to isn't seeing the DECA in the HR24-100.
Have you ever connected a ethernet cable to the 24? This normally disables the DECA in it.
Check its info screen and see if it shows "coax connected" under networking.
If not, then you might reboot it or re-run the SAT setup.
Also check the coax to the BB DECA to make sure there isn't something like a diplexer on the line.
If you are still having problems, you might [temp] move the BB DECA to where your SD receiver is and see if it will sync with the 24 there. It doesn't need to be connected to your router for the cLink to sync.
"Just some steps to try".
Post any/all results and we can take it from there.
Since the BB DECA has a blinking cLink, then the coax it's connected to isn't seeing the DECA in the HR24-100.
Have you ever connected a ethernet cable to the 24? This normally disables the DECA in it.
Check its info screen and see if it shows "coax connected" under networking.
If not, then you might reboot it or re-run the SAT setup.
Also check the coax to the BB DECA to make sure there isn't something like a diplexer on the line.
If you are still having problems, you might [temp] move the BB DECA to where your SD receiver is and see if it will sync with the 24 there. It doesn't need to be connected to your router for the cLink to sync.
"Just some steps to try".
Post any/all results and we can take it from there.