I tried find out how to do it by reading the documentation but I'm not able to find it.

When I go to the webmaster tools and try to submit a sitemap, on testing I get the message that my sitemap doesn't contain url's

When I go directly to it I do see them http://albirms.com/index.php?option=com_jmap&view=sitemap&format=images&lang=nl and also for the other languages.

How do I submit my sitemap to Google and Bing?

Also tried to use the Submit sitemap to searchengines function, also no result.

I hope someone can explain me what I'm doing wrong.