Gridview - Delete and Edit button not working

[mtn*rain]

I have a gridview with an object data source. I have the edit and delete button on each row but cannot get either one of them to work. I do not receive an error, it just doesn't delete. Refreshing does not show deleted either.
The method within the dataset is

 DELETE FROM BookWHERE        (BookID = @Original_BookID)

 UPDATE       BookSET                ISBN = @ISBN, Title = @Title, Author = @Author, Status = @Status, Loaned = @Loaned, Series = @Series, Description = @DescriptionWHERE        (BookID = @Original_BookID)

I have a business layer that defines the methods for update and delete:

[System.ComponentModel.DataObject]
public class BookManager
{   
    ///
    /// Gets a list with Address objects for the requested contact person.
	///

    private BookTableAdapter _bookAdapter = null;
    protected BookTableAdapter Adapter
    {
        get
        {
            if (_bookAdapter == null)
                _bookAdapter = new BookTableAdapter();
            return _bookAdapter;
        }
    }
..........
[System.ComponentModel.DataObjectMethodAttribute(System.ComponentModel.DataObjectMethodType.Update, true)]
    public bool UpdateBook(int bookid, string isbn, string title, string author, string status,
    string loaned, string series, string description)        
    {
        BookDataSet.BookDataTable books = Adapter.GetBookByBookID(bookid);
        if (books.Count == 0)
            return false;           // no matching record found, return false
        else
        {
            BookDataSet.BookRow book = books[0];

            book.ISBN = isbn;
            book.Title = title;
            book.Author = author;
            book.Status = status;
            if (loaned == null) book.SetLoanedNull();
            else book.Loaned = loaned;
            if (series == null) book.SetSeriesNull();
            else book.Series = series;
            if (description == null) book.SetDescriptionNull();
            else book.Description = description;

            // Update book record
            int rowsAffected = Adapter.Update(book);

            // Return true if one row updated
            return rowsAffected == 1;
        }
    }

[System.ComponentModel.DataObjectMethodAttribute(System.ComponentModel.DataObjectMethodType.Delete, true)]
    public bool DeleteBook(int Original_BookID)
    {     
        // Delete book record
        int rowsAffected = Adapter.Delete(Original_BookID);  

        // return true if one row deleted
        return rowsAffected == 1; 
    }

aspx:

<asp:ObjectDataSource ID="odsBooks" runat="server" SelectMethod="GetBooks" InsertMethod="AddBook"                   
        TypeName="BookManager" DeleteMethod="DeleteBook" UpdateMethod="UpdateBook" 
            OldValuesParameterFormatString="original_{0}">          
       <UpdateParameters>
        <asp:Parameter Name="BookID" Type="Int32" />
                <asp:Parameter Name="ISBN" Type="String" />
                <asp:Parameter Name="Title" Type="String" />
                <asp:Parameter Name="Author" Type="String" />
                <asp:Parameter Name="Status" Type="String" />
                <asp:Parameter Name="Loaned" Type="String" />
                <asp:Parameter Name="Series" Type="String" />
                <asp:Parameter Name="Description" Type="String" />
       </UpdateParameters>
       <DeleteParameters>
                <asp:Parameter Name="BookID" Type="Int32" />
       </DeleteParameters>
    </asp:ObjectDataSource>  
<asp:GridView ID="gvBooks" runat="server" DataKeyNames="BookID" AllowSorting="True" 
        AutoGenerateColumns="False" BackColor="#CC00FF" BorderColor="#FF0066" ForeColor="#FFCCFF" 
        BorderStyle="Double" BorderWidth="5px" CssClass="DataWebContolStyle" Font-Size="Small" 
        Font-Names="Kristen ITC"  DataSourceID="odsBooks">               
      <Columns>
           <asp:TemplateField ShowHeader="False">
            <ItemTemplate>
            <asp:LinkButton ID="btnEdit" runat="server" CausesValidation="False" 
                CommandName="EditThis" Text="Edit" 
                Font-Size="Small" ForeColor="#FFCCFF" Font-Bold="True" BackColor="#FF33CC" 
                BorderColor="#FF0066" BorderStyle="Double" BorderWidth="3">
            </asp:LinkButton>
            <asp:LinkButton ID="btnDelete" runat="server" CausesValidation="False" 
                CommandName="DeleteThis" Text="Delete" 
                OnClientClick="return confirm('Are you sure you want to delete this book?');" 
                Font-Size="Small" ForeColor="#FFCCFF" Font-Bold="True" BackColor="#FF33CC" 
                BorderColor="#FF0066" BorderStyle="Double" BorderWidth="3">
            </asp:LinkButton>        
            </ItemTemplate>
          </asp:TemplateField> 
        <asp:BoundField DataField="BookID" HeaderText="BookID" ReadOnly="True" 
            InsertVisible="False" />
        <asp:BoundField DataField="ISBN" HeaderText="ISBN" />
        <asp:BoundField DataField="Title" HeaderText="Title" SortExpression="Title" />                          
        <asp:BoundField DataField="Author" HeaderText="Author" SortExpression="Author" />                          
        <asp:BoundField DataField="Status" HeaderText="Status" SortExpression="Status" />                          
        <asp:BoundField DataField="Loaned" HeaderText="Loaned" SortExpression="Loaned" />                          
        <asp:BoundField DataField="Series" HeaderText="Series" SortExpression="Series" />                          
        <asp:BoundField DataField="Description" HeaderText="Description" />                                                 
    </Columns>
</asp:GridView>

Any help would be much appreciated. I am new to .Net, so I am not sure if I am just missing something.