Thank you for your answer, but this didn't solve my problem so far. But after a little research if found the solution to my problem by myself that might be interesting for you.
I used the deeplink according to your example on the wiki page. But as your log in dialog is always redirecting to your routexl.nl domain, one cannot use other tlds that you provide - like .com or .de The reason might be probably your log in cookie that is only valid for routexl.nl.
To make it easier for other users you might change your deeplink URL example on your wiki page from http://www.routexl.com/?q=... to http://www.routexl.nl/?q=