Network Share -System error 53 has occurred

Hi,

I have a shared folder that I would like to access remotely but receiving the following error message:

System error 53 has occurred. The network path was not found.

Command Used: Net use Z: \\ServerIPAddress\ShareName /User:UserName PASSWORD

When the above command is used on the same network as shared folder is, it worked fine when I am on a different network I get the system error 53. 

Note that the ServerIP I can still ping successfully from the client (means the remote machine can ping the server IP but can't connect to share.)