I have an asus P2B-F with 3 dimms, (1) 256 MB Crucial double sided dimm, (1) 64 MB Crucial single sided dimm and (1) 128 MB Generic PC133. The problem is that when all three dimms are inserted the board only recognizes the double sided dimms, if i remove the generic module it recognizes both crucial dimms. I tried the generic dimm on another board and it did not post if the board had other dimms installed. any suggestions or comments?