you must pair the pairs properly

...so I wouldn't have gone far wrong by following the pretty picture on the back of the plate -- which you can't see in the photos, 'cos I removed it to get the punch tool close enough.

Simply sounds like a problem with the punchblock -- I've borrowed a multimeter, so I'll check the pin assignments and continuity this evening.

fifteen quid from Netshop

...whose website was down over the weekend, or I would have bought the stuff from there.