Why "X: user not authorized to run the X server, aborting." when in "script" command subshell?

["Daniel B." <dsb@smart.net>]

I get:

  X: user not authorized to run the X server, aborting.

if I try to run "startx&" from inside subshell created by the "script"
command?

Why is that?  (Is something about the subshell necessarily different
such that startx can't run?  Or is startx confused (is there a bug)?)

Thanks,
Daniel
-- 
Daniel Barclay
dsb@smart.net