我按照https://developers.google.com/analytics/devguides/collection/analyticsjs/social-interactions向 GA 发送跟踪请求，但发现它没有被跟踪。我的要求是：
Request URL:http://www.google-analytics.com/collect?...
Request Method:GET
Status Code:200 OK
Request Headersview source
Accept:image/webp,*/*;q=0.8
Accept-Encoding:gzip,deflate,sdch
Accept-Language:en,zh;q=0.8,zh-CN;q=0.6,en-GB;q=0.4,en-US;q=0.2
Connection:keep-alive
Host:www.google-analytics.com
Referer:http://...
User-Agent:Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1521.3 Safari/537.36
Query String Parameters
v:1
_v:j10
a:1788874096
t:social
_s:2
dl:http://...
ul:en-gb
de:UTF-8
dt:Page2
sd:32-bit
sr:1680x1050
vp:810x741
je:1
fl:11.8 r800
sn:facebook
sa:share
st:fb-en-Page2
_utma:44421046.1409067252.1362688044.1372941239.1373199240.34
_utmz:44421046.1362688044.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none)
_utmht:1374205992734
_u:OAEC~
cid:1959698593.1360101450
tid:UA-4xxxxxx9-1
z:193394111
其他event和pageview跟踪都很好。有谁知道哪里错了？