Doubled language prefix in URL when used with content profile

Hi,

I wanted to use multistep for a content type connected with content profile. I created a menu item with path "node/add/content-type" to which the language prefix is added automatically so that the user will be linked to "en/node/add/content-type" when he chose English language for example. When he did not create his profile yet everything works fine. But when he stops creating during the multistep process (maybe he goes to an other page) and then again clicks on the menu item with link "en/node/add/content-type", it will result in a link shown in browser like

"/en/en/node/19/edit?redirect=user%2F9"

which ends on a "page not found" page.

I change "default display" on content type administration page from "multistep form" to "complete form" but nothing changed. Has anyone an idea about this issue???

Greez,
Tobias