OD debug 汇编程序问题

刚刚学汇编，遇到问题，恳请大家帮忙，原代码如下：
.386
.model flat, stdcall
option casemap :none
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
; Include 文件定义
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
include windows.inc
include user32.inc
includelib user32.lib
include kernel32.inc
includelib kernel32.lib
include gdi32.inc
includelib gdi32.lib
.code
dwValue dd ?
.code
main:
mov eax,5
add eax,6
push eax
pop eax
mov dwValue,eax
mov ebx,dwValue
;call WriteInt
;exit
invoke ExitProcess,NULL

end main
编译链接正常，用od反汇编，单步调试到mov DWORD PTR DS:[401000],eax时（对应于源代码的mov dwValue,eax）出现问题，提示access violation when writing to [00401000],无法再往下执行。求各位帮忙，不胜感激。。。

哦，我自己看到了，是写错了，把.data 写成了 .code 纠结了几个小时