App Approval process issue (Socket cant connnect to server)

In China ,We can successfully connect to our login server(ip:223.4.132.13) using the API int connect(int,const struct sockaddr*,socklen_t) __DARWIN_ALIAS_C(connect); in <sys/socket.h> header file .But in USA,our app cant connect successfully .
What do you think of this problem ?

Are you connecting to your server from a shared internet connect using wifi or via 3g in china?

Jamal Glasgow wrote:

Are you connecting to your server from a shared internet connect using wifi or via 3g in china?
Yes,we can use both 3G , cellular networks and WAN (Wide Area NetWork) to connect successed anywhere in china.

Ok I just ping your server and it seems to be sending and receiving packets. I am living in caribbean which is right below the USA. Does multiple users from the USA report the same issue?