Asp.net treeview problem

[queryme]

Hi

I have a tree view. and iframe.

tree view code is this

<asp:TreeView ID="TreeView1" runat="server" ExpandDepth="0" Height="166px">
                <Nodes>
                <asp:TreeNode Text="Fix Computer Problems" Value="Fix Computer Problems">
                <asp:TreeNode Text="Computer Problem" Value="Computer Problem">
                <asp:TreeNode Text="Slow Computer" Value="Slow Computer" NavigateUrl="http://www.computerhope.com/issues/ch000179.htm" Target="frmtreedata" ></asp:TreeNode>
                <asp:TreeNode Text="Computer Shuts Down" Value="Computer Shuts Down" NavigateUrl="http://www.computerhope.com/issues/ch000689.htm" Target="frmtreedata"></asp:TreeNode>
                <asp:TreeNode Text="Computer Won't Boot" Value="Computer Won't Boot" Target="frmtreedata"></asp:TreeNode>
                <asp:TreeNode Text="Blue Screen of Death" Value="Blue Screen of Death" Target="frmtreedata"></asp:TreeNode>
                <asp:TreeNode Text="Freezes &amp; Crashes" Value="Freezes &amp; Crashes" Target="frmtreedata"></asp:TreeNode>
                <asp:TreeNode Text="Restore Computer" Value="Restore Computer"></asp:TreeNode>
                <asp:TreeNode Text="Memory Problems" Value="Memory Problems" NavigateUrl="http://www.microsoft.com/atwork/maintenance/pcproblems.aspx" Target="frmtreedata"></asp:TreeNode>
                <asp:TreeNode Text="Annoying Pop-Up's" Value="Annoying Pop-Up's" NavigateUrl="http://www.computerhope.com/issues/ch000491.htm" Target="frmtreedata"></asp:TreeNode>
                </asp:TreeNode>
</asp:TreeView>

Now i have a frame on the same page if i click on the navigateurl. it should show me that html page in that frame which i have on the form.