Easy Retweet Button

Easy Retweet Button

I am using your easy retweet js in my blog. It shows the total count of traffic for particular blog post.
But sometimes it shows the constant numeric value like 1315 ,1388...etc., in this series.

At that particular time, the bitly url becomes like http://bit.ly/Undefined, can you help me to find out the reason.
And also is there any way to get only the tweet count alone.


P.S: I am using all the values as default given by you (Username for bitly account)



--With Regards
M.Bala Ganesh