Datacolor User to User Support Group.

im trying to calibrate my samsung lcd hdmi tv. and i cant get it to work properly,i use lightroom 4 .i shoot raw ,and  everything looks darker when i post to internet,,ive contacted datacolor but never get answer to why it does this...also trying to get the spyder software to match what i see with my brother mfc-495cw printer from screen and my prints come out darker as well. dont know where to go now..