We don't have any experience with this STB configuration, but I would confirm that the stream you are trying to use plays back on other HLS devices,
such as iPad and iPhone etc on the same network. If playback is good on iOS but not on the STB then the next step is to figure out what special requirements the STB has, perhaps there are specs available from the manufacturer that detail this. If playback isn't working on iOS either then we can help with that.
aske123, (or anybody) what was the Amino firmware version that worked with HLS streaming? I am having the same error 'File download not allowed' on a new Amino 129 (SD box) with version 2.5.2-Ax4x-opera10.
I am also guessing you are entering a regular HLS URL like: