I just want to explain why it does not work the way you set it up...
You have a router at your home, which it has 2 connections, an internal with the 192.xxx.xxx.xxx that is your privite network address and an external IP address which i do not know.
Intenet<---public IP address--->router<-----private IP---->Home PC
Well, when you are outside of your network, you can not see the Private Network (because you use a NAT), the IP address you can see will be you outside IP address (which i will call it public). Only the public IP address is publish and therfore you can see it.
The private IP address is not publish, so you can not see it.
In order to access your router, you need to create A VPN (or telnet) to you Public IP address.
Read about VPN (virtual private network) connection and you will know what to do.
NOTE: IP address 192.168.xxx.xxx (among other ones) are not public, are reserve to be use for private networks.