Cannot open software remotely XQuartz Xlib: Invalid MIT-MAGIC-COOKIE-1 key

I found the asnwer in link at the bottom of the page.

Basically what I have to do without restarting the computer is to:

rm ~/.Xauthority*

On the server, then close X11, then re-open X11 and connect to the server again.

Thanks!

http://slopjong.de/2011/06/14/invalid-mit-magic-cookie-1-key/