"Update/Cancel" buttons don't appear in TemplateField Edit button

"Update/Cancel" buttons don't appear in TemplateField Edit button

When you create an edit button in every row of a Gridview using
CommandField it displays update/cancel buttons after clicking, so you can
accept/cancel changes. However, I want an edit button that has tooltip
text, and since CommandField doesn't have tooltip property, i used
TemplateField. It worked with the delete button, but I'm having problems
with the edit button:
<asp:GridView ID="GridView1" runat="server"
AllowPaging="True" AllowSorting="True"
DataMember="DefaultView"
DataSourceID="SqlDataSource1" AutoGenerateColumns="False"
DataKeyNames=FIELD,FIELD,FIELD" CellPadding="4"
ForeColor="#333333" Width="90%"
Height="90%" Font-Size="Small">
<RowStyle BackColor="#EFF3FB" />
<Columns>
<asp:BoundField DataField="FIELD"
HeaderText="FIELD" ReadOnly="True"
SortExpression="FIELD" />
<asp:BoundField DataField="FIELD" HeaderText="FIELD"
SortExpression="FIELD" />
<asp:BoundField DataField="FIELD" HeaderText="FIELD"
SortExpression="FIELD" />
<asp:BoundField DataField="FIELD"
HeaderText="FIELD" ReadOnly="True"
SortExpression="FIELD" />
<asp:BoundField DataField="FIELD"
HeaderText="FIELD" ReadOnly="True"
SortExpression="FIELD" />
<asp:BoundField DataField="FIELD" HeaderText="FIELD"
SortExpression="FIELD" />
<asp:CommandField ButtonType="Image"
Visible="true" EditText="Edit"
ShowEditButton="True"
EditImageUrl="images/pencil1.png"></asp:CommandField>
<asp:TemplateField >
<ItemTemplate>
<asp:ImageButton ID="deleteButton"
runat="server" CommandName="Delete"
Text="Delete"
OnClientClick="return
confirm('¿Are you sure?');"
ToolTip="delete"
ImageUrl="images/DeleteRed1.png"
/>
</ItemTemplate>
</asp:TemplateField>
</Columns>
<FooterStyle BackColor="#507CD1" Font-Bold="True"
ForeColor="White" />
<PagerStyle BackColor="#2461BF" ForeColor="White"
HorizontalAlign="Center" />
<SelectedRowStyle BackColor="#D1DDF1" Font-Bold="True"
ForeColor="#333333" />
<HeaderStyle BackColor="#507CD1" Font-Bold="True"
ForeColor="White" />
<EditRowStyle BackColor="#2461BF" />
<AlternatingRowStyle BackColor="White" />
</asp:GridView>
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString="<%$
ConnectionStrings:DBUserInterfaceConnectionString %>"
SelectCommand="SELECT ... FROM ... INNER JOIN ... ON
..."
DeleteCommand="DELETE FROM ... WHERE ...=@param;"
UpdateCommand="UPDATE ... SET ... = @param, ... =
@param2 WHERE ... = @param3 and ... = @param4 and ...
= @param5;"
>
</asp:SqlDataSource>
As I said before, I replaced CommandField with:
<asp:TemplateField >
<ItemTemplate>
<asp:ImageButton ID="editButton" runat="server" CommandName="Edit"
Text="Edit" ToolTip="Edit" ImageUrl="images/pincel1.png" />
</ItemTemplate>
</asp:TemplateField >
but "Update/Cancel" buttons don't appear, so I can't update/edit anything.
Why does it happen?
Any Ideas to implement a succesful edit button?
NOTES:
Both buttons don't have vb code behind, for some reason delete button
works just with DeleteCommand in the SqlDataSource, and if I try to delete
the command, it prompts error because no DeleteCommand is specified.
UpdateCommand has no purpose, it can be deleted. I could use it for a
update button instead of an edit button, but when i tried, it says @params
are not known.