Its because of French-rap recordlabel Secteur A stopping their contract. Their EP 4 Coins Kandala was recorded in Kinshasa and Kinshasa-studios had at that time a terrible sound, unless if mobile studios coming from Europe were used, but that wasn't sadly the case for them. Akademia struggled alot in Kinshasa when coming back from the Viagra-tour, it was the contract that they signed with Bralima/Primus later, that used to save them a little bit.
Sexy Chocolate was made in the vision to conquer the European market. That was the dream that Sam still had, after that they failed to do it with Secteur A. But the album created problems after getting released. Because when trying to get royalties from SACEM, Modogo, Mboshi and Popolipo discovered that Sam Tshintu credited all songs to his name. Modogo and Sam even apparently fought against each other in the streets. That was is the thing that Modogo and Mboshi made Sam leave on his own. Later the three guys would get contacted individually to return to Quartier Latin. Modogo and Mboshi accepted the offer, but Sam refused.