Aftermarket LED lights not working together.

[BPrestwich]

I have ggp autostyling tail lights installed on my car and have worked perfectly until I installed LED 2xcite DRL headlights. Now the running taillight doesn’t work but all the indicators and break lights work. I swapped the original tail lights in and they work fine. Any ideas on how to fix it pls I would like to keep both my aftermarket lights.