請教一個IP Camera設置問題

我剛買了一個IP Camera，在家裏的LAN查看沒有問題，不過不能通過Internet查看。我設置步驟如下，請高手們幫我參謀一下。

1. Set up IP camera to a local static IP, such as 192.168.0.34 with a port number 1234
2. Set up DNS Server to my ISP DNS server address
3. Create a DNS account in dyndns.com to point to my public static IP address, web link is like ipcam.webhop.biz
4. Configure my Dlink router DSL-G604T to create a virtual server to port forward http traffic in port 1234 to my IP Camera\'s IP address 192.168.0.34.
5. Open DMZ to only allow 192.168.0.34 be exposed to internet

Then I tried view my ip camera through http://ipcam.webhop.biz:1234, but I could not be able to view it.

在這過程中，我肯定錯過某一個步驟，懇請大家幫我參詳參詳 .