install freebsd 5.1 on HP ia64 rx2600 fail

[sun wienne]

use keyboard select from cdrom boot

load kernel

then system check all device ,network , hd ,mouse(usb)found,  
keyboard(usb)found

at install menu, keboard input fail,   any key invalidation , but <Caps 
Lock>

i change sun keyboard ,othen usb keyboard  , also input invalidation

i buy a <usb-ps2 keyboard-mouse> line ,link a ps2 keyboard ,  try ,,too 
invalidation

who know this why ?   how to fix ?

how make a freebsd 5.1 iso file to install, allow boot message send to 
serial(ttyd0)

my english is bad ,excuse me.

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