dhtmlxWindow don't load skins

Suite and Optimus Suite 5
#1

dont load skins and image buttons(cancel, maximize if available but no picture)

<asp:Content ID=“Content1” ContentPlaceHolderID=“head” Runat=“Server”>

<%––%>





</asp:Content>
<asp:Content ID=“Content2” ContentPlaceHolderID=“MainContent” Runat=“Server”>

#2

[code]<asp:Content ID=“Content1” ContentPlaceHolderID=“head” Runat=“Server”>

<%----%>
[/code]
#3

Apply

dhxWins.setSkin("dhx_blue");