The first thing to try is this:
If that does not work… I am releasing an update to Link today, in a couple hours. It contains a workaround for membership plugins which break the core WordPress
wp_login action by calling it manually and not passing the user object. The later items is what stops Link from working correctly. It also corrects a bug where it would display the add my directory entry link to user roles which did not have that correct capabilities assigned. If the s2member fix did not fix the issue perhaps the workaround I’m introducing in the next release will.