Media server name not being seen

Make sure that your media server is running on the same local network as your radio and that there are no firewalls standing in between the server and your radio. Any problems seeing media servers are almost always due to some sort of 3rd party security software blocking ports, so do ensure any installed security software is not blocking this process. Do consider that a default install or 'clean' install of a Windows or MAC OS system - before any 3rd party security software is introduced - will always result in successful media serving. It's the later addition of 3rd party security software that will always break this process.

 Tip! In 9\10 cases, any failure to 'see' a media server will be due to local computer security software preventing this process happening. If you think you have enabled this process in your firewall then check again. Computers can operate more than one firewall and it is possible that you may have 3rd party firewall software installed that you didn't realise you had. Check and check again.

If your firewall doesn't appear to be blocking your media server then you should ensure port 9000 isn’t being used by another application installed on your computer.
 
 
Media is seen but isn't playing.

Music file format. Make sure your music is stored in a format your radio can play. Check here http://support.pure.com/kb_article.php?ref=8844-UAGX-9394 You must also ensure your music is not DRM protected, as 3rd party players like your radio will not be allowed to play protected content.

Make sure you are only running one instance of your server as more than one instance will have you problems serving. Windows users should check Windows Task manager and Mac users should check Activity Monitor and stop all instances of anything relating to 'Twonky' and then restarting one instance of Flow Server only.

Media server or web radio stream cutting out
 
Is your network channel sharing with a nearby network? You should ensure you are not sharing the same Wi-Fi channel as another network close by (you have 13 to choose from). Use a tool like http://wifihopper.com/ and check to see if your network is broadcasting in the same channel as another network nearby. Does the problem persist if you move to a freely available channel?
  
 
Testing media server ability (Windows only)
 
If you can't get a 3rd party media server like Flowserver running on your PC then an appropriate test is to try using a Windows Media Player server. If you are using Windows Firewall all the required (TCP) and (UDP) ports are automatically opened when you turn on media sharing. If you are using a different software or hardware firewall then you might need to open these ports manually. WMP server is normally automatically passed by most 3rd party firewalls, so it's a good test.
 
 
Port settings for Windows Media Server
 
If you have to manually enter port settings in to your security software then the ports are (assuming you're on the same subnet) are...
554 (TCP), 1900 (UDP), 2177 (TCP, UDP), 2869 (TCP), 5004-5005 (UDP), 10243 (TCP), 10280-10284 (UDP)
 
You won't be able to use the media sharing feature if Internet Protocol security (IPsec) is enabled on your computer. You'll normally find IPsec started if your computer is on a domain network.