Get thread url in addthis

[angelcosta]

I am using addthis as a sharing tool in my forum. So far so good exceto for one thing: the shared url points to the current page (sometimes pointing to page two, thread, etc), but i want it to point to the main thread page.
I could not understand the link syntax to vbulletin. How can i get the main thread url?

Gonna make a plugin And share it as soon as i get this fixed.