__utmx cookie is never set

[marccarabias]

use UnitedPrototype\GoogleAnalytics;
$experiment = new GoogleAnalytics\Experiment('xxxxxxxxxxxxxxxxxx');
$variation = $experiment->chooseVariation();

everytime I get different variations, the reason is that $_COOKIE['__utmx'] is unset...
@thomasbachem do you know why? do I have to add more code apart from these 3 lines?? Thanks

[hlorofos]

actually cookie is set, please debug with the help of curl or similar tool.
there are two cookies set:
< Set-Cookie: __utmx=84438360.pD0ycwtaSmKDkr_7thBqaA$0:1; expires=Sat, 14-Nov-2015 13:24:37 GMT; path=/; domain=.xxxx
< Set-Cookie: __utmxx=84438360.pD0ycwtaSmKDkr_7thBqaA$0:1399296277:8035200; expires=Sat, 14-Nov-2015 13:24:37 GMT; path=/; domain=.xxxx

[LRP-sgravel]

I had the same problem where the cookie wasn't set on the SERVER side only. Therefore, GACX wasn't able to deliver the same experiment on all occasions. My fix was to use a different cookie name (gaep_utmx) to duplicate the utmx cookie.