 Paris Saint-Germain's nightmare season in Ligue 1 continued, with Paul Le Guen's ailing side looking prime candidates for relegation after a hapless defeat at Caen.Amara Diané scored two goals as PSG beat Auxerre and kept alive their hopes of avoiding relegation.Toulouse's Mohamed Fofana denied fellow relegation strugglers Paris Saint-Germain a vital three points with a late equalizer.