Bootstrap fluid layout - fixed width of sidebar

i have a fluid layout based of twitters bootstrap.

<div class="container-fluid">
    <div class="row-fluid">
       <div class="span2">
           <!--Sidebar content-->
       </div>
       <div class="span10">
           <!--Body content-->
       </div>
    </div>
</div>

It would be very nice to have the sidebar a fixed width. if a change the layout from fluid to "static" and set the width of sidebar to

220px

and i resize the window or change my resolution to 1024... the body-content jumps under the sidebar. how can i avoid this?

EDIT: Got it. Will post my "solution" later on. thanks for your responses