[STRUTS] internationalization

Hi,

I finally am making progres with my first struts project.
Now I thought let's make it multi language, this can't be hard.
I found a lot (most the same) examples so what can go wrong

so my problem, it does not work.

I have made several MessageResources_EN.properties and MessageResources_nl_BE.properties files.
When starting up, the browser chooses the nl_BE file.
I have included in the stuts-config.xml file:
<message-resources parameter="messages.MessageResources_EN" />
<message-resources parameter="messages.MessageResources_nl_BE" />

Now when setting my browser to eng, is does not load the other properties file (I still see it in Dutch)

I also included all the needed .tld's for struts.
Finally I found some code to dynamically change the language.
Also this does not work.
What am I doing wrong??

Any help is appriciated.