Unable to install on CompaQ D310

[freebsd]

Hi all
 I tied to install 6.1 on a CompaQ D310. At the beginning I only got a BTX 
Halt. Then after googling around I found a similar problem on the D510 and 
disabled DMA in the BIOS. Now the system boots (the same with the floppy 
set), but when it comes to partitioning I got "No disk drives found!".
The ATA controller is found in the dmesg log and the CD is obviously 
working.
The machine is a 2.4 P4 with 768Mb and 60Gb ata disk.
Any ideas?