Gridview - Delete and Edit button not working

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

Code:

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DELETE FROM BookWHERE        (BookID = @Original_BookID)

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Code:

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

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

Code:

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[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;
    }

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aspx:

Code:

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<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>

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

Does anyone know???