I'll post some link for you to have a read of. I haven't got the time to go through it all and find the right solution for you unfortunately.
http://forum.xbmc.org/showthread.php...27&pid=1430657
http://www.boxtoptheater.com/pages/u...-to-xbmc-g-box
http://taffymc.com/xbmc-buffering-pr...w-to-fix-them/
https://www.youtube.com/watch?v=5V6cZ9p045w
http://totalxbmc.tv/new-forum/index.php?topic=19.0
I think the best thing you can do is try it again and then make a note of any error messages that are displayed because then you can pin point the nature of the problem and and try and see what is causing it.