FAils to activate

i have had AddThis working perfectly but it has suddenly refused to activate — normally is at bottom of blogs or pages.

It works in the sidebar widget but that’s not where i want it.

Upgraded with a new version of plug-in 3.0.2 and WordPress 3.5.1 but it seems to be in the Save Changes… it keeps giving me error of ::>> ✖ The username, password, and profile combination you entered is invalid. <<<

I’ve been and scoured thru the settings and profiles but can’t find the problem.

http://www.deadly-guitars.com/

Any help would be appreciated!

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