Ubuntu Multimedia :: Adding Higher Resolutions To 9.10

I'm trying to add a higher resolution to my system. I've tried to edit xorg.conf but I think I'm wrong. Everytime I edit and reboot, it tells me I need to run in low graphics mode for now. Now I'm trying 'xrandr.' I was able to create a new mode just fine, but when I try to add it to the appropriate output, I get this:

Code:
prog@ubuntu:~$ xrandr --addmode LVDS1 1280x1024_50.00
X Error of failed request: BadMatch (invalid parameter attributes)
Major opcode of failed request: 149 (RANDR)
Minor opcode of failed request: 18 (RRAddOutputMode)
Serial number of failed request: 25
Current serial number in output stream: 26

Here's what xrandr returns:
Code:
prog@ubuntu:~$ xrandr
Screen 0: minimum 320 x 200, current 1024 x 768, maximum 4096 x 4096
VGA1 disconnected (normal left inverted right x axis y axis)
LVDS1 connected 1024x768+0+0 (normal left inverted right x axis y axis) 286mm x 214mm
1024x768 60.0*+ 50.0
800x600 60.3 56.2
640x480 59.9
TV1 disconnected (normal left inverted right x axis y axis)
1280x1024 (0x111) 109.0MHz
h: width 1280 start 1368 end 1496 total 1712 skew 0 clock 63.7KHz
v: height 1024 start 1027 end 1034 total 1063 clock 59.9Hz
1280x1024_50.00 (0x112) 89.4MHz
h: width 1280 start 1352 end 1488 total 1696 skew 0 clock 52.7KHz
v: height 1024 start 1025 end 1028 total 1054 clock 50.0Hz

I don't know why it puts it in TV1. There's two of them because I tried two different refresh rates.