A TCP/IP communication is subject to several rules before it can be established. As an example, you are subject to the basic IP rules: can you ping the target device? If you can't then you need to correctly define the network addresses so that you and the target pertain to the same network. Second, your firewall must not block desired port and your application need to be granted access to this channel. Last but not least, some devices integrate security attributes that permit limiting access from remote stations: have you checked this with your device?
Can you post the code you use to try connecting to the remote device?
Finally, instead of reviving a six years old, already solved thread it would be better to open a new discussion.
