la esta solucionado
Código PHP:
<%
For Each File in Upload.Files
Ext = UCase(Right(File.Path, 3))
If Ext <> "PDF" Then %>
<span class="nomal"><b><%=File.Filename%></b></span> <span class="normal_activat_rellevant">NO ES UN ARXIU VÀLID.</span><br>
<%Else
NEW_NAME = replace(File.FileName," ", "_")
File.SaveAs Server.MapPath(carpeta_pujar & NEW_NAME)
Response.Write "New name: " & File.FileName & "<BR>" %>
<span class="normal"> <%=carpeta_pujar%><b><%=File.FileName%></b> - (" <%= File.Size %>" bytes)</span><br />
<%
End If
Next