here the explanation
agpgart did not detect the agp nforce/nforce2.
the driver nvagp is integrated into the driver of the graphics boards NVIDIA, thus you have 2 solution:
to resell your ati9000 and to buy a card nvidia ou to resell your nforce2 and to buy another motherboard
me, I chose to get rid of my mother board, I will direct myself towards kt400, the commercial practices of nvidia resembles those of microsoft....