Problem with my code - it's not working......

[custard]

Here's the source(it is x86 Intel ISA Assembly with one C++ extern):

BITS 16
ORG 0X7c00
.code
jmp STA
STA:

push ebx
mov bl, 0XFF
mov al, 0X0F
cmp al, ebx
jne PNT

PNT: 
mov WORD PTR[+325], ex
mov si, WRD
int 0x10h

.data

WRD db 'N', 0
dw 0XAAFF

It says some "symbol" is missing, but I can't remember and I'm on Vista now! Please help me!

[Lachlan Easton]

Try turning the flux capacitor off and on.

[Catfish3]

Line 14?

1 2

mov WORD PTR[+325], ex

mov WORD PTR[+325], ebx