As I suspected, it was a bug that was checking *your* Regard towards them (which is Uncooperative) instead of theirs towards you.
Fixed.
I re-uploaded the patch I had uploaded this morning, with this fix. If you have downloaded it already, please download again.
I also uploaded the _AutoBuild version of the patch, with all the same fixes, plus a better handling of the way the diplomacy AI is done.
Misfire will be busy the next few days, and I'll be away from wednesday to sunday, so it's unlikely there'll be updates before next week.
Please keep an eye out for the Colony Management options (now working), and diplomacy in general (Regard and Morale effects of agreements - there have been some changes there). If you find anything wrong, please report.