[Plugin: Slick Social Share Buttons] URL not displaying when tweeting

Hello everyone,

I have a small issue with that great plugin.

When I click Tweet it only displays the page/post title plus “via @user”.
Anyone knowing why the URL (the most important does not display?

I tried with my bit.ly account and any other URL shortener option, no way to have it working

Thanks for your help!
Laurent

http://wordpress.org/extend/plugins/slick-social-share-buttons/