Nevertheless, because his father Bernard Ato I had supported William IX of Aquitaine in his attempt to take Toulouse and because his lands controlled the roads between Alfonso's Languedocian and Provençal lands, Bernard Ato and Alfonso were fundamentally at odds.
Namun demikian, karena ayahandanya Bernard Aton IV telah mendukung Guilhèm IX d'Aquitaine dalam usahanya untuk mengambil Toulouse dan karena tanahnya mengendalikan jalan antara tanah Languedocian dan tanah Provençal, Bernard Aton dan Alfonso apda dasarnya bertentangan.