Invalid MIT-MAGIC-COOKIE-1 key

[Oleksiy (alex) Bolgarov]

Hello All!

I logged to Linux as non-root user, started X11 (by sratrx),
then, in xterm, su-ed to root and tried to run xemacs.

It printed following:

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Xlib: connection to ":0.0" refused by server
Xlib: Invalid MIT-MAGIC-COOKIE-1 key

Initialization error: X server not responding
: ":0.0"

-----------------------

What does this mean?

And. please, can somebody point me to the information
about internal work of X11?

alex