The first thing you want to try is to open a browser, and type in:
http://x.x.x.x:1080
where x.x.x.x is your IP from your ISP. If this doesn’t work, the app won’t work either. Can you type down the first two fields (i.e. first two x.x.) of your IP? From that we can probably tell if this is an external IP or internal IP.