Problem install FreeBSD 6.0 on Dell PowerEdge 2850

[Hoang Lang-E11272]

Dell PowerEdge 2850 (2) 2.8GHZ, 2GB RAM
I configure 2 hard drive as RAID 1 or 2 drives as RAID 0 each but still having same problem.
I upgraded to latest bios A04 and LSI Logic Perc 4e/Di Raid firmware to 521S-A05 but still having problem when installing FreeBSD 6.0 both i386 and ADM64.  It is hanging at Extracting Base into / directory ... at 45%.  I tried so many times with different CDs as well.
 
When I hit Alt + Control+ Delete, error come up " Write failure on transfer! (wrote 655360 bytes of 1425408 bytes) (100%) Press enter or space OK.  If I hit Alt+Control+Delete again, another message User Confirmation Requested "Unable to transfer the base distribution from acd0. Do you want to try to retrieve it again? If I hit yes, "Unable to open base/base.inf: User interrupt... Reinitialize media? 
This machine didn't have any problem with CentOS 4 or FreeBSD 5.4.
 
I already spent couple days already but no luck at all.
 
I need help please
 
Thank you,