iplayer and itvx keep freezing

[Avatar1982]

In the last couple of days both iplayer and itvx keep freezing and buffering during use (many times). It was fine before now, my internet is 1gb so not an issue, i have reset both boxes and refreshed apps on both boxes. All pther apps including netflix and youtube work no problems but these 2 just keep buffering and make it very difficult to watch anything. 

Thanks