Poor Quality streaming via dm800hd

hi,
i have dm800hd downstairs, i streeam it upstairs on my laptop hooked up to a FULL HD TV.

anyway, firstly wen i try and play HD channels on my laptop the computer doesnt allow it, it opens up VLC then crashes...

secondly when i am streaming a channel and watching on my FULL HD TV via HMDI cable the quality is not that great...any tips?
cheers