How to get the selected item from a dropdown box bound to an array of custom objects

I create an array of custom objects and bind it to a dropdown box.

SQLObject[] boxes = new SQLObject[] {
      new SQLObject(eRecordType.EMPLOYEE, "SELECT TOP 15 * FROM dbo.Employee"),
      new SQLObject(eRecordType.LOGGER, "SELECT TOP 15 * FROM dbo.Logger")};
ddBindArray.DataSource = boxes;
ddBindArray.DataBind();

Then in the selected index changed event, I want to get the item selected:

protected void ddBindArray_SelectedIndexChanged(object sender, EventArgs e) {

   I tried getting the selected item and casting it...
       SQLObject current = (SQLObject)ddBindArray.SelectedItem;

   I also tried getting the indexed item
       SQLObject current = (SQLObject)ddBindArray.Items[ddBindArray.SelectedIndex];

..but both times I got this error at compile time:

Cannot convert type 'System.Web.UI.WebControls.ListItem' to 'SQLObject'

How can I get the object selected without having to store the original array and refer back to it?