Unable to boot a newly installed system

I just installed QNX on a PC/104. The bootloader crashes as follow: "Press

ESC key to .altboot…D". According to the knowledge base, I think

this is due to a unsupported BIOS call for 8G+ hard drives(if it has a link

with "Err D). Then, I installed the bootloader for older BIOS, but I have

the same problem. Everything works well if I boot my system from the

CDROM and choose to boot QNX from the hard drive. How can I fix that?

Thank you very much.