帮忙一个菜鸟的问题

下面代码那儿出错了啊,怎么不显示字符串啊!
.model small
.data
; string db 0fh, 20h, 'happy new year'
count dw 17
quit db 0ah,0dh,'press any key to exit......',13,10,'$'

.code
start:
mov ax, @data
mov ds, ax

lea dx,quit
mov ah, 9
int 21h

mov ax,4c00h
int 21h

end start

顺便讲下字符串声明时的规则!
不胜感谢啊