Common problems
Accessing the web interface / Firewall and router settings
After starting the server, your first test should be on the same machine that is running MyTunesRSS. Start a browser on that computer and enter the following address. If you changed the port from default 8080 to anything else in the MyTunesRSS configuration you have to enter that port of course.
http://127.0.0.1:8080
The special address 127.0.0.1 means the same computer the browser is running on, i.e. the so called localhost. With this address you should see the login page of MyTunesRSS. If this works you are sure that MyTunesRSS itself is up and running.
For accessing MyTunesRSS on your local network at home you have to use one of the internal addresses from the server info window. There might be a single address if you have a single network interface only or multiple addresses otherwise. Just try all of them on the client computer or device like the Playstation Portable or Nintendo Wii. If none works, you probably have a firewall running on the MyTunesRSS computer. As a first test you could simply turn it off and try again. Of course you don't want to disable your firewall. You have to configure it to allow incoming TCP traffic for MyTunesRSS on the port you configured (default is 8080).
The next step would be accessing MyTunesRSS from the internet. Besides your firewall you also have to configure your router in this case. You need to setup port forwarding and forward traffic on port 8080 (or whatever you changed it to) to the computer running MyTunesRSS.
Firewall and router settings are hardware and software dependent, so there are no general instructions on the details. If you have problems accessing MyTunesRSS from the internet or on your local network, remember to do the above test on the same computer to ensure MyTunesRSS itself is working. You can also try posting your questions at the Codewave forums.