Cant use my native resolution

Hi, i use my TV as a monitor which resolution is 1920 X 1080 and i use a GTX 280 graphics card.

When setting my resolution to 1920 X 1080 my display goes off the edge of the screen, i cant see the start menu bar ect.

Then using nvidia control pannels "resize HDTV desktop" to make the image fit again it auto decreases my resolution to 1808 X 1004.

Is their anyway i can get it to run at 1920 X 1080 resolution and fit on the sceen, cause it seems a bit strange it cant run the same resolution as the TV.

This all used to work fine before i updated the drivers too, i updated these because i keep seeing a tiny horizontal purple line flash to the bottom left side of my screen. It appears every 30 seconds or so and is rather annoying, but the drivers didnt solve this issue.