Alias forwarding issue - complete url

[psygarden]

at this moment with the url for the alias set to http://www.domain.be

When i load domain.com/gallery/something it's redirected to domain.begallery/something
or
domain.com/news.php is redirected to domain.benews.php

so it's missing just a slash to work properly... adding the slash directly to the database doesn't seem to work because it isn't applied. The web internface doesn't allow me to include a trailing slash at all (invalid format for forward url?)

any more suggestions?