Invalid CurrentPageIndex value. It must be >= 0 and < the PageCount in asp.net

i got error in datagrid. suppose i moved one page to another page in datagrid. This type of the error should come. how i will solve that one.

This is my coding


<aspataGrid ID="gridedit" runat="server" Width="100%" DataKeyField="CountryID" BorderStyle="Ridge"
GridLines="None" BorderWidth="2px" CellPadding="3"
CellSpacing="1" AllowSorting="True" PagerStyle-HorizontalAlign="Center" HorizontalAlign="Left"
OnPageIndexChanged="gridedit_PageIndexChanged"
PageSize="20" AllowPaging="True"
AutoGenerateColumns="False" SelectedItemStyle-Width="100px" OnSelectedIndexChanged="gridedit_SelectedIndexChan ged">
<HeaderStyle Font-Bold="True" ForeColor="White" BackColor="#A53A6A"></HeaderStyle>
<FooterStyle BackColor="Beige" ForeColor="Black" />
<PagerStyle Font-Bold="True" Mode="NumericPages" Font-Underline="True" HorizontalAlign="Center" />

<Columns>
<asp:BoundColumn DataField="CountryID" Visible="False" HeaderText="RegID">
<itemstyle backcolor="GhostWhite" />
<HeaderStyle BackColor="#0793CF" Font-Bold="True" />
</asp:BoundColumn>
<asp:BoundColumn DataField="JobID" HeaderText="JobID">
<itemstyle backcolor="GhostWhite" />
<HeaderStyle BackColor="#0793CF" Font-Bold="True" />
</asp:BoundColumn>

<asp:BoundColumn DataField="FirstName" HeaderText="FirstName">
<itemstyle backcolor="GhostWhite" />
<HeaderStyle BackColor="#0793CF" Font-Bold="True" />
</asp:BoundColumn>

<asp:BoundColumn DataField="EmailId" HeaderText="EmailId">
<itemstyle backcolor="GhostWhite" />
<HeaderStyle BackColor="#0793CF" Font-Bold="True" />
</asp:BoundColumn>

<asp:BoundColumn DataField="AreaofExpertise" HeaderText="AreaofExpertise">
<itemstyle backcolor="GhostWhite" />
<HeaderStyle BackColor="#0793CF" Font-Bold="True" />
</asp:BoundColumn>
<asp:BoundColumn DataField="ExeperienceLevel" HeaderText="ExeperienceLevel">
<itemstyle backcolor="GhostWhite" />
<HeaderStyle BackColor="#0793CF" Font-Bold="True" />
</asp:BoundColumn>

<asp:TemplateColumn HeaderText="Country" Visible="False">
<ItemStyle HorizontalAlign="Left" Wrap="False" />
<HeaderStyle ForeColor="White" HorizontalAlign="Left" BackColor="#0793CF" Font-Bold="True" />
<ItemTemplate>
<asp:Label ID="lnkCountry" runat="server" Visible="false" Text='<%# Bind("CountryName") %>'></asp:Label>&nbsp;
</ItemTemplate>


</asp:TemplateColumn>

<asp:TemplateColumn HeaderText="View Resume">
<HeaderStyle ForeColor="White" HorizontalAlign="Left" BackColor="#0793CF" Font-Bold="True" />
<itemstyle backcolor="GhostWhite" HorizontalAlign="Left" Wrap="False" />
<ItemTemplate>
<asp:Label ID="lnkName" runat="server" Text='<%# Bind("ResumefilePath") %>'></asp:Label>&nbsp;
<asp:HyperLink ID="lBtnResumefileAttachment" runat="server" ImageUrl="~/images/paperclip_blue.gif"
NavigateUrl='<%# "../UpLoadResume"+ Eval("CountryName")+"/"+ Eval("ResumefilePath") %>' Text='<%# Bind("ResumefilePath") %>'></asp:HyperLink>

</ItemTemplate>


</asp:TemplateColumn>


</Columns>
<SelectedItemStyle Width="100px" />
</aspataGrid>

yakoobismail