problem with GridView and Paging

[Jeff]

hi

asp.net 2.0

I have a GridView on a webpage. The GridView don't display navigating
buttons to go from page to page...

Here is some markup:
<asp:GridView ID="gvwTest"
Width="100%"
BorderWidth="0"
runat="server"
AllowPaging="true"
PageSize="2"
AutoGenerateColumns="false"
ShowHeader="false"
DataKeyNames="Id"
OnRowDataBound="gvwTest_RowDataBound">

<PagerSettings Mode="NumericFirstLast"
PageButtonCount="2"
Position="Bottom" />
<Columns>

The gridview displays the 2 first rows...

any suggestions?