Forms Data Controls :: GridView Doesn't Show Picture In Row

I do a gridview code that when displaying the information that come from the database is not showing any error at all, but is not displaying the right picture. The problem, I think, is that the (Eval("....") is not reading the values that are coming from the DataKeysNames. Due to this the right pictures are not displayed. But in another column, just for testing purposes I was able to display the values from DataKeysNames with the Eval. So I do not know what is going on and to make worse browser is not giving me any error. So, this is the line that is not processing, reading or executing well:

ImageUrl='<%# IIF( (Eval("TUDTIWasItemUpgraded")) = "Yes",&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; string.Format("~/Images/ItemUpgradedTo.gif"),&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; string.Format("~/Images/ItemNoUpgradedYet.gif")&nbsp;&nbsp;&nbsp; )&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; %>'

And this is the complete code for the GridView

<
asp:Panel
ID="DownlineUDTIGameClassifiedsViewPanel"
runat="server"
>
<asp:GridView
ID="DownlineUDTIGameClassifiedsViewGridView"
runat="server"
AutoGenerateColumns="False"
DataKeyNames="AutoNumber,TUDTIWasItemUpgraded"
DataSourceID="DownlineUDTIGameClassifiedsViewSqlDataSource"
CellPadding="4"
ForeColor="#333333"
AllowPaging="True"
PageSize="100"
OnDataBound="DownlineUDTIGameClassifiedsViewGridView_DataBound">
<FooterStyle
BackColor="#00693E"
Font-Bold="True"
ForeColor="White"
/>
<RowStyle
BackColor="#FFFBD6"
ForeColor="#333333"
/>
<PagerStyle
BackColor="White"
ForeColor="#333333"
HorizontalAlign="Center"
/>
<SelectedRowStyle
BackColor="#FFCC66"
Font-Bold="True"
ForeColor="Navy"
/>
<HeaderStyle
BackColor="#00693E"
Font-Bold="True"
ForeColor="White"
/>
<AlternatingRowStyle
BackColor="White"
/>
<PagerSettings
Mode="NextPreviousFirstLast"
Position="TopAndBottom"
/>
<Columns>
<asp:BoundField
ItemStyle-HorizontalAlign=Center
DataField="TUDTIGenerationNumber"
HeaderText="Generation"
SortExpression="TUDTIGenerationNumber"
/>
<asp:BoundField
DataField="TEnterDate"
HeaderText="Enter Date"
SortExpression="TEnterDate"
/>
<asp:BoundField
DataField="TItemTitle"
HeaderText="Listing Title"
SortExpression="TItemTitle"
/>
<custom:LongTextField
DataField="TListingComment"
Width="400px"
Height="75px"
HeaderText="Listing Comment"
HtmlEncode="false"
/>
<asp:TemplateField
HeaderText="Picture">
<ItemTemplate>
<asp:ImageButton
ID="ThumbNailImageButton"
runat="server"
Width="75px"
PostBackUrl='<%# string.Concat("~/Classifieds/DetailPage.aspx?AutoNumber=",Convert.ToString(Eval("AutoNumber")),"&amp;FlagForm=NoSubmitted")
%>'
ImageUrl='<%# IIF(System.IO.File.Exists(Server.MapPath(string.Format("~/UploadedImagesClassifieds/{0}{1}",
Eval("AutoNumber"), "Pic1.jpg"))), string.Format("~/UploadedImagesClassifieds/{0}{1}", Eval("AutoNumber"), "Pic1.jpg"), "~/UploadedImagesClassifieds/NoPicture.gif") %>'
/>
</ItemTemplate>
<ItemStyle
HorizontalAlign="Center"
/>
</asp:TemplateField>
<asp:TemplateField
HeaderText="Item Upgraded To">
<ItemTemplate>
<asp:Image
ID="XItemUpgradedToPicture"
ImageUrl='<%# IIF( (Eval("TUDTIWasItemUpgraded")) = "Yes", string.Format("~/Images/ItemUpgradedTo.gif"),
string.Format("~/Images/ItemNoUpgradedYet.gif") ) %>'
runat="server"
Width="150px"/>
</ItemTemplate>
<ItemStyle
HorizontalAlign="Center"
/>
</asp:TemplateField>
<asp:TemplateField
HeaderText="Testing">
<ItemTemplate>
<asp:Label
ID="Label1"
runat="server"
Text='<%# Eval("TUDTIWasItemUpgraded") %>'
>
</asp:Label>
</ItemTemplate>
<ItemStyle
HorizontalAlign="Center"
/>
</asp:TemplateField>
<asp:TemplateField
HeaderText="Item Upgraded To">
<ItemTemplate>
<asp:Image
ID="ItemUpgradedToPicture"
ImageUrl="~/Images/ItemUpgradedTo.gif"
runat="server"
Width="150px"/>
</ItemTemplate>
<ItemStyle
HorizontalAlign="Center"
/>
</asp:TemplateField>
</Columns>
</asp:GridView>