problem with SSL redirection when http URL is entered

Hello i use the plugin for quite a while now. Last week i switched over to SSL and since that moment i got the following problem. If a not registered user wants to login he gets the normal loginpage. When he enters the username and password he gets in kind of a loop and is getting ask for the username & password over and over again. Now I figured that if the User enters a URL via https:// the URL of the loginscreen looks something like this : https://www.domain.de/wp-login.php?redirect_to=http%3A%2F%2Fwww.domain.de%2F%3Fp%3D32&reauth=1 and now he is in the loop of logging in over and over again. If he enters a https:// URL he gets the following URL for the login page: https://www.domain.de/wp-login.php?redirect_to=https%3A%2F%2Fwww.domain.de%2F%3Fp%3D32&reauth=1. Is there any option or possibility to tell the plugin that it always should redirect to https:// no matter if the requested page is entered only with https://? Even if the user is logged in via https it is not possible to open pages via http URL cause it always asks for authentification and the loop starts again… Changing the .htaccess file also does not work as the plugin manages the redirectios itself…