When I add my own Container as below. The problem is that when I open the web part configuration to change the HTML Envelope my new container don't show up int the drop down box. What am I doing wrong?

/Magnus


/*#Containers/Black box Green#*/
.blackBoxGreen
{
border: 1px solid #00ff00;
margin-bottom: 15px;
}

.blackBoxGreen .title
{
background: #00ff00;

repeat-x;
padding: 3px 5px;
font-size: 12px;
margin-top: 0px;
color: white;
margin-bottom:0px;
}

.blackBoxGreen .content
{
padding: 5px;
background: #f3f3f3;
}