WP-MyDigipass plugin

Dear all,

I am using the MyDigipsss plugin. This is used add 2 factor authentication to the login screen of WordPress. After the authentication the MyDigipass goes to http://localhost/wp/index.php?mydigipass-action=callback but nothing happens.

When I go directly to the URL I see the plugin is called. But when I follow the normal flow and if trace it with httpFox I see:
http://localhost/wp/index.php?mydigipass-action=callback&code=3jq9u1roxo53r3hv5odlu8iku&state=http%3A%2F%2Flocalhost%2Fwp%2Fwp-admin%2Fprofile.php redirects to
http://localhost/wp/?mydigipass-action=callback&code=3jq9u1roxo53r3hv5odlu8iku&state=http%3A%2F%2Flocalhost%2Fwp%2Fwp-admin%2Fprofile.php and this redirects to
http://localhost/wp and the plugin is not called.

Does somebody know how I can fix this?

regards,

Matt