That worked, only I still got a similar problem right now.
When is use the <% if Level(2) %> the loginpage looks allright, but on all the other pages the menu doesn't show up.
Here's the code of the menu:
[html]
<% if Level(2) %>
<ul id="Menu2">
<% control Menu(2) %>
<% if Last %>
<li class="$LinkingMode" id="menu2-last"><a href="$Link" title="{$Title}">$MenuTitle</a>
<% else %>
<li class="$LinkingMode"><a href="$Link" title="{$Title}">$MenuTitle</a>
<% end_if %>
</li>
<% end_control %>
</ul>
<% else %>
<% if Title = Home %>
<ul id="Menu2"><li class="$LinkingMode"><a href="$Link" title="{$Title}">Welkom</a></li></ul>
<% else %>
<ul id="Menu2"><li class="$LinkingMode"><a href="$Link" title="{$Title}">$Title</a></li></ul>
<% end_if %>
<% end_if %>
[/html]
Thanks for the support!