Add / Remove Tab Pages to a Tab Panel on the fly?

[drb]

How do I Add or Remove Tab Pages to a Tab Panel at run-time?
I tried:

                          
 var tp = bNimble.tabpanel;
var ct = tp.items.items.length;
var tpg = tp.add({
    title: 'Contact ' + ct,
    iconCls: 'user ' + ct,
    html: 'Contact Screen ' + ct
});

The items count went up, but the new tab page icon does not show up on the tab bar.
Adding tpg.show(); did not help.
Thanks
David

[mitchellsimoens]

This shows the new tab:

var tabpanel = new Ext.tab.Panel({
    fullscreen : true,
    items      : [
        {
            title : 'One',
            html  : 'one'
        },
        {
            title : 'Two',
            html  : 'two'
        }
    ]
});

tabpanel.add({
    title : 'Three',
    html  : 'three'
});

[drb]

You are right. I must have had some other error in my code.
Thanks
David