Important: Users cannot login with other languages

Hi Skywarrior Team,

i use a test version of WMPL but with full features. Will buy a licence in future. Now i have a problem with the login popup in other languages. My site uses two languages: English (default) and german. If i set directory usage in WPML, users cannot login on the german page. Just on the english page.

If i try to login with german language, the following link will be displayed: http://mysite.com/de//wp-login.php?

I had to check this in the header.php and found this one on line 159: <form name="LoginWithAjax_Form" id="LoginWithAjax_Form" action="<?php echo esc_url(home_url())?><?php echo (!is_plugin_active("better-wp-security/better-wp-security.php")) ? "/wp-login.php?" : "/?"; ?>" method="post">
Note: Some “” characters changed for here, because the others will break the code.
What can I do to make it work here?

Another:
If i set subdomain usage in WPML, users get logged out when changing the language and has to login again. I’m note sure about that but i think it is a wrong DNS setup by the server. I don’t have rights to edit DNS settings on my server because its a shared host.
I’ll go to another provider in future but for now the subdomain usage is not working.

Cheers