Will not stay logged in

Been using for several months, updated to newest version and it has been working. just yesterday i made a few items on my Joomla/K2 blog. Hit sync got all errors on Linkedin, Facebook, Twitter. Checked error log and says "not logged in". Went back and logged into the 3 accounts. Hit sync, same error. Went back to items edited them to make them different and went back to Social Backlinks (sync on updates is on). All 3 accounts were not logged in! Re logged in, hit sync, got same "not logged in" error. Removed and re-installed with the same behavior. Nothing has changed on the site since i installed Social Backlinks and it has been running fine until now.

Martin