After Binding data - No color change to child Node - Telerik treeview

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treeview

Telerik

I have bound the data to the tree view using dataset. Now I have even set the color of Parent Node. But unable to apply the color or style to child node after binding the data.

Please help?

.cs file code

SqlDataAdapter da = new SqlDataAdapter("select * from Menu_Modules", con);
DataSet ds = new DataSet();
da.Fill(ds, "Menu_Modules");

RadTreeView1.DataSource = ds;
RadTreeView1.DataFieldID = "ID";
RadTreeView1.DataFieldParentID = "ParentID";
RadTreeView1.DataTextField = "Field_Name";
RadTreeView1.DataNavigateUrlField = "URL";
RadTreeView1.DataBind();
con.Dispose();

aspx file code

<telerik:RadTreeView ID="RadTreeView1"  runat="server" Skin="Black" 
	Height="100%" Font-Size="Small" ForeColor="White" BorderStyle="None" 
	AppendDataBoundItems="True" EnableViewState="False" Font-Bold="True">
                                
<nodes>
	<telerik:RadTreeNode  runat="server" Text="Navigate Modules" 
	EnableContextMenu="False" Enabled="False" EnableViewState="False" 
	Font-Size="Small" ForeColor="White" PostBack="False">
</nodes>