I’m stumped

I had a bit of a problem on Sunday and I tried again tonight. Still no luck!

I wired my lamps in, the LEDs still work if I place a battery across them, but they won’t light on DCC power. They are wired in parallel with the cathode to the blue and anode to the white wires. I have checked the direction several times!

My first thought was that my standard 1K resistor was too high so I swapped it for a 240 one. Still no light.

Has anyone any ideas?