Keyboard beating me into submission?

Using statler with eee PC. Trying to switch two keys around Shift_R to Up and Up to Shift_R.
I edit ~/.Xmodmap

mpierce@crunchbang:~$ cat .Xmodmap
keycode 121 = XF86AudioMute
keycode 122 = XF86AudioLowerVolume
keycode 123 = XF86AudioRaiseVolume
keycode 210 = XF86Launch3
keycode 111 = Shift_R
keycode 62 = Up
mpierce@crunchbang:~$

then run xmodmap ~/.Xmodmap

Shift_R now working as up (what I want).
Up refuses to bind to new Shift_R.
I cannot figure out why...
Solutions?