Zombani

Can anyone help me on this problem i am facing? "I tried installing DK 2 but it keeps giving me this reply c:\WINDOWS\SYSTEM32\AUTOEXEC.NT. this systemfile ain't compatable 4 MS-DOS and Microsoft Windows ..... . choose exit to close the program." i read the previous threads and tried the registry thingy but it still doesnt work. my key was disabled (set to 0) previously. HELP PLEASE!!!! thanks so much