CSS missing in dialog boxes

Hey,
i was just wondering why the stylesheets are not displaying properly in the dialog boxes. It works fine in the main editor. Here is the screenshot:
http://img523.imageshack.us/my.php?imag ... lem4jg.png

I'm using ASP with IIS in windows XP and using this code to initialize the editor:

the editor is in the folder /site/admin/FCKeditor/
<%
Dim oFCKeditor
Set oFCKeditor = New FCKeditor
oFCKeditor.BasePath = "FCKeditor/"
oFCKeditor.Config("SkinPath") = "skins/silver/"
oFCKeditor.value= rsReadRecord("body")
oFCKeditor.Height = "400"
oFCKeditor.Create "pageContent"
%>


but this problem does not occur if I dont specify the skin. (dont include the line:oFCKeditor.Config("SkinPath") = "skins/silver/")


any idea how i could fix this?
thanks