Impossible to press a button to install windows xp

I have a SATA hard drive (which has been formatted) ... I want to install XP ..
When I turn on the PC (with the CD in the drive winXP), he said at one point:
"Press any key to boot from CD-ROM ...
NTLDR is missing
Press Ctrl Alt supp to restart .. "

PROBLEM: can not press a button! (and thus start the installation)

Yet when I go into bios, the keyboard works ..
HELP! a day of misery, finally finding a PC with a connection to ask

--- I tried to install it from this same disk on another PC or another keyboard: same ...

Your keyboard is connected to PS / 2 or USB?
Personal because, on one of my pc, the USB keyboard does not always work when it comes to this kind of manipulation

I found the solution.

"For this enable support for this device in the BIOS.

Locate an option type USB Device Legacy Support or All USB peripherals and set the option enabled.

This option is usually on the menu Integrated Peripherals. "