[Plugin: Qtranslate Slug] Quicktags didn't work

I am trying to use the language quicktags, but it places the text just behind each other.

So first the English text shows up and than the Dutch text. But i would like to see the English text on the English site and the Dutch Text on the Dutch site.

I am using these tags:

<!–:en–>Some text hier
<!–:–>
<!–:nl–>Nederlandse tekst hier
<!–:–>

Am i the only one with this problem? Or is this the wrong place?

Thank you
jeroen

http://wordpress.org/extend/plugins/qtranslate-slug/