Based upon what you have bought and stated it should all work. If you take the Pronto and hold it in front of the comonent and send the IR pattern directly to each of the comonents, do each of them work properly?

If that is the case and when you insert the DL receiver connecting block and emitters and aim a the DL receiver Carefully shielding each component so it can only see the IR from its stick on emitter:

Do any of the componets work when you send the IR to the DL receiver

If none work then either the receiver or the connecting block does not work.

If at least one works, does it work from any and all ports of the connecting block? If it does work from all then The connecting block and DL receiver are fine and one would assume that you have a bad emitter or it is not stuck on in the correct place.

If it works from only some ports then you have a bad connecting block