The Red Eclipse ambush and the Exchange invitation are different triggers, although the invitation usually comes right after the Red Eclipse incident if you have raised enough hell.
The Red Eclipse trigger requires that you walk over a certain spot before the entrance to the Refugee Sector. Happens automatically if you walk but easy to miss if you usually get around via Airspeeder.
If you have enough 'rep' with the Exchange then the invitation will be triggered if you enter the Refugee Landing Pad from another area (including Ebon Hawk), provided that the Red Eclipse incident has taken place already.
Things that make the Exchange take note of you:
- help Greeda and tell the Duros to get stuffed
- interrupt a meeting of criminals in one of the rooms off of the Refuge Landing Pad
- agree to help Vogga
- help Fassa by assigning ship priorities
- help Lootra and his wife (you *must* visit them in the flophouse afterwards, even though you get the XP already when telling Aidaa the good news)
- help the refugees by negotiating good deals with Serroco and Exchange or by massacring them (you can actually do both in both cases, but remember to finish *all* negotations before proceeding to stage two)
Dunno about freeing the kid and healing Geriel, but these might help also.
<{POST_SNAPBACK}>
I can't finish the Greeda/Duros quest as I don't have an option to in dialog. I can basically ask Greeda about my "stance" and something about how she interacts with humans.
I've interupted the meeting of crimanals and killed all, I've offered to help Vogga, I helped Fassa, I just killed Lootra without talking to him (I was trying to be as mean as possible), I just killed the Serroco thugs without talking to anyone and then I killed the Exchange in the sector. I also killed Geriel and accidentaly helped the kid.
Right now, I can't really do any conversation with anyone in the refugee sector, just one liners. Also, I've already killed the Red Eclipse people, but still no luck.