Cancel Enter Key when in Edit Mode in RadGrid

[Sravanthi]

I have a TemplateColumn inside a Radgrid as follows. I populate the grid using NeedDataSource.
 
               <telerik:GridTemplateColumn UniqueName="name1" SortExpression="Id" HeaderText="Product#" DataField="Number" >
                        <ItemTemplate>
                                <asp:Literal runat="server" ID="ltId" Text='<%# Eval("Product.Id") %>'></asp:Literal>
                        </ItemTemplate>
                        <EditItemTemplate>                        
                            <telerik:RadTextBox runat="server" ID="txtProductNumber" Text='<%# Eval("Product.Id") %>'
                                Width="120px" OnTextChanged="ProductNumber_TextChanged" AutoPostBack="true" >
                            </telerik:RadTextBox>
                        </EditItemTemplate>
                    </telerik:GridTemplateColumn>

When  I enter text in the textbox and hit enter,  it is calling the default button on the page. How can I make it call the  "OnTextChanged" event for the textxbox Instead?

Thanks for the Help in advance!!
Sri