Inheriting from RepeaterItem

[wilkinsonr@gmail.com]

Hi All,
I'm having a metal blank. This is my class:

public class MyRepeaterItem : System.Web.UI.W ebControls.Repe aterItem
{
public MyRepeaterItem( int itemIndex, ListItemType itemType) :
base(itemIndex, itemType) {}
public bool IsDataItem {
get {
return ((this.ItemType == ListItemType.It em) || (this.ItemType
== ListItemType.Al ternatingItem)) ;
}
}

public Image Images(string ID) {
return (Image)FindCont rol(ID);
}
}

and this is my code:

protected void repFiles_ItemDa taBound(object sender,
RepeaterItemEve ntArgs e) {
MyRepeaterItem rep = (MyRepeaterItem )e.Item;

if (rep.IsDataItem ) {
rep.Images("ico n").ImageUrl = "icons/testing.jpg";
}
}

and I get the error "Unable to cast object of type
'System.Web.UI. WebControls.Rep eaterItem' to type 'MyRepeaterItem '."

All I want to do is add some helper functions to the RepeaterItem. Any
helpp would be great.
Thanks,