Auxiliary ship supply trader issue
I'm hoping someone can enlighten me as to what I am doing wrong. I've been using auxiliary ships for a while, and I typically have a transport assigned to pick up supplies for it. It's never worked correctly, so I will just manually give the transport instructions to go pick up supplies when needed. I haven't really cared about it, but I know it's supposed to work automatically and now I'm trying to figure out what setting I have wrong.
Here's how it is set up currently:
The auxiliary ship is empty of all supplies, and it is parked next to an allied solar station that has energy cells for sale. There is currently a frigate that needs missiles docked on the auxiliary ship, with the resupply request in place. I've assigned a boa transport to the auxiliary ship, to "trade for Commander". The pilot of both the auxiliary ship and the transport are at least two stars, which shouldn't matter because the solar station is right next to the auxiliary ship. The transport still "cannot find trades within the area". All ships in this scenario are set to "high" for "automatic resupply" in the individual behavior tab.
Is there some setting I'm supposed to be checking to make this work?
Edit: I had a few people point me in the right direction in the comments. Thank you to everybody that put me on the right track, it is greatly appreciated!