XF86Setup problem

[IN <igor.naumovski@keble.oxford.ac.uk>]

Hi,

I've recently totally reinstalled potato, installing first slink
development environment and then upgrading to potato,
Since then I can't use XF86Setup to change the settings, if I try to
change keyboard layout or apply changes, the screen goes black with green
stripes for a second and then just goes back to background x gray colour,
i can move mouse but I get no windows again and have to kill it.

I've tried changing to older version of XF86Setup and also tried doing a
completely clean installation in exactly same way but same problem occurs.
Has anyone had similar problem and if so what could cause it. I had potato
installed before and this didn't occur, just not sure why does it happen
now :o(

Thanks,

I.N.