Please help with installation error

I tried installing Delta Force Land Warrior for my nephew on my sisters
computer and received the following error message;

"16 bit Windows Subsystem
C:\WINDOWS\SYSTEM32\AUTOEXEC.NT. The system file is not suitable for
running MS-DOS and Microsoft Windows applications.
Choose 'close' to terminate the application or 'ignore' to ignore it."

She has a relatively new Compaq with a AMD3000, 512 Ram, Windows XP Home
Edition. I run Land Warrior and Joint Operations on my HP which has nearly
identical system hardware and programs. For what ever reason NovaLogic never
responds to my requests for support any longer and I want to get my nephew
playing. Anyone who can provide some indication of a means of trouble
shooting or point me in the correct direction please email
chataxe RemoveThis @hotmail.com or post your comment here. Thank you in advance for any
help you may provide.

JH