how to set index.page as welcome-file?

System

Hi,

I try to make my welcome-file working.
I would like that calling http://lsrtsrv:1776/sites/mysite/mydirectory/
returns me automaticaly the page http://lsrtsrv:1776/sites/mysite/mydirectory/index.page

I try to add
<welcome-file-list>
<welcome-file>index.page</welcome-file>
</welcome-file-list>
in web.xml...

But it returns a 490 status in access log and display the site chooser.

Any idea?

Thanks, Greg.