502 error

Hi,

I have been using tweetable on two websites. On one website it’s working perfectly fine but not on the other one. Some times I got a 502 message just after the tweet which takes place instead of the link to my article.

Sometimes it works perfectly fine and sometimes I have this error. Do you know why and how to correct it ?

http://ww.wp.xz.cn/extend/plugins/tweetable/