ᐅ IKEA rail system, correctly installed yes / no

Hello everyone,

Today I installed my new SÄNDA track system on the wall, connected it, and hung a lamp on it – but it’s dark!
I used a BASISK lamp and mounted it on the adapter.
I connected the track system directly to my power supply using the ceiling connection.

There shouldn’t be much that can go wrong, right?!

What did I forget? Has anyone assembled this before?

Thanks,

Fumanchu