Internet connection failing with Galaxy Tab 2

Hi there,
I have been working online with my Galaxy Tab 2 as a modem using my HP Pavilion PC, recently I have noticed working on the PC the internet connects fast, but when I try using my Tablet, You tube buffers endlessly and I cannot get a video playing, on the PC it plays well with few buffering, what could be wrong with my Tablet? How can I get the same speeds on my device?
