Which tool are you using to set your resolution nvidia control panel or windows?
Also have you tried creating your own resolution via the nvidia control panel.
As a further point when you say a 22" TV is it actually a TV or is it a monitor; some TV's will have reduced resolutions in comparison to monitors.
Does the tv/monitor have a VGA/DVI port which you can try; HDMI can be awkward with resolutions at times.
Please answer the above questions and I will get back to you as soon as.