Hello, I'm trying to run my first ASM 8086 program on MASM on Windows Vista 64bit OS.
I put this program on my MASM editor:

.model small
.stack
.data
message   db "Hello world, I'm learning Assembly !!!", "$"

.code

main   proc
mov   ax,seg message
mov   ds,ax

mov   ah,09
lea   dx,message
int   21h

mov   ax,4c00h
int   21h
main   endp
end main

and the MASM editor gives me this output that I got no idea what's wrong with the program:

 Assembling: D:\masm32\First.asm
D:\masm32\First.asm(9) : error A2004: symbol type conflict
D:\masm32\First.asm(19) : warning A4023: with /coff switch, leading underscore required for start address : main
_
Assembly Error

Where is the problem with this code? This is my first ASM program please remember. Thank you :)