can't work function keys on xorg-7.4 + twm

[Kazumaro Aoki]

After upgrading xorg version to 7.4, several setting:
  "F1" =  : all : f.iconify
  "1"  = m: all : f.iconify
  "F3" =  : all : f.raise
  "3"  = m: all : f.raise
  "F4" =  : all : f.lower
  "4"  = m: all : f.lower
  "F5" =  : all : f.zoom
  "5"  = m: all : f.zoom
  "z"  = c|s:all: f.fullzoom
  "n"  = c|s:all: f.downiconmgr
  "p"  = c|s:all: f.upiconmgr
in my .twmrc does not work.

I used FreeBSD-7.1R/i386 and on-board video in the mother board: Intel
D865GLC.  I use xf86-video-intel and it is specified in xorg.conf:
  Section "Device"
          Driver "intel"
I also tried vesa driver, and the problem does not solved.
Moreover, I tried "pkg_delete -a" and reinstalled ports-current, but
the same problem occurs.

How to solve the problem?

Thanks in advance.

Kazumaro Aoki