Error: "X server does not support locale"

[hj.beckers@kreis-steinfurt.de]

I'm getting the above error and " cannot set locale modifiers" and I can't 
enter any accented characters. 
The system is a notebook running W2K. Changing the WM makes no difference 
(tested wmaker, openbox). 
I even copied my configuration files from a working installation 
(NT4/SP6). The Xwin-binary is the same. 
Grepping the output of "set" on both machines for "LC_something" reveals 
nothing. 
Umlauts in bash work on both machines (using .inputrc). I re-installed 
xfree86-etc - no difference.

Any hints
hjb