Is this a boot disk?
If you try again could you please post back the error message verbatim.
You might also try the Microsoft 6 floppy boot setup. If this works you might then be able to run your CD or else perhaps repair the old boot via the Recovery Console.
How to obtain Windows XP Setup boot disks
If you cannot boot into Windows I would suggest first trying the Recovery Console:
http://support.microsoft.com/default...b;EN-US;307654
To try to fix the boot:
Assuming that your XP is on C: then:
Type:
FIXMBR C:
then enter. After that completes type:
FIXBOOT C:
then enter. After that completes type:
BOOTCFG /rebuild
then enter. After that completes type:
EXIT
then reboot.
If in the process you are asked to run
chkdsk say YES.
Also after the BOOTCFG /rebuild you will be prompted to:
C:\Windows
1. Add installation to boot list? (Yes/No/All):
2. Enter Load Identifier: (Custom description for an operating system loading from the Boot menu)
3. Enter Operating System Load Options: (that is: /fastdetect)
Reply:
1. Yes
2. XP
3. /fastdetect