[mapserver-users] Q: How to change transform via URL

[Markus Spring]

I want to change the TRANSFORM value of a layer via an URL paramter.
I Tried 
  &map_MSSuser_feature_transform=false 
and
  &map_MSSuser_transform=false 
where my layer definition is

LAYER
  NAME MSSuser
  TYPE point
  POSTLABELCACHE true
  CLASS 
    NAME C1
    SYMBOL "pin_green"
  END
END

but nothing worked

Markus