I followed your advice and reinstalled francesco's but without living economy, then reinstalled EE. Now when I play, the details button has replaced the haggle button, but nothing happens when I press it. It doesn't lock up or anything, it just makes a noise and no menu comes up. Also, if I try to sell anything, it asks if i want to give it away for free.
Are you sure you are running the game through OBSE18b4 or newer (b6 strongly adviced)?
If you are correctly using OBSE18, can you confirm that EE writes to the console that it has updated values from its ini file? This shall be written to the console about 5 seconds after each savegame load. Open console and write "tdt" to see all such messages (and tdt again to hide them).
I am running FCOM with oblivion xp, if that makes a difference.
Nope, EE is completely compatible.
Btw, if the problem continues, please follow up in Enhanced Economy's http://www.gamesas.com/bgsforums/index.php?showtopic=1058568