Ok, then you have an atty.
I do drip and don't use cartridges for more than a year but...
What you experience could mean:
1. Primer is still in the atty, blow it out;
2. Cartridge poly isn't touching the bridge causing juice not get sucked by the bridge and those 2 drops you put in isn't enough to juice the atty;
3. Atty could have very low resistance which could be verified only by multimeter.
There are may be some other causes but that's what I have for now.