微信主动推送问题

如题
现在按照文档写了代码，
content =
"""{
"touser":"ozhOVjongGItLsOeBn850MfWj-W0",
"msgtype":"text",
"text":
{
"content":"Hello World"
}
}"""
def send_info(content,request):
if content:
contentd = json.loads(content)
print contentd
print type(contentd)
post_URL='https://api.weixin.qq.com/cgi-bin/message/custom/send?access_token=%s'%\
request.session['access_token_dict']['access_token']
# print post_URL
try:
print u2.urlopen(post_URL,urllib.urlencode(contentd)).read()
except Exception,e:
print e

错误代码 {"errcode":40003,"errmsg":"invalid openid"}
openid 用了weixin的“ozhOVjongGItLsOeBn850MfWj-W0” 不行
有用注册名还是不行，请问这个openid 到底是什么