I have created an subfolder in my application.<BR>than in this folder I have an default.aspx file and then I want to use a register clause referencing an ascx file that is in the root directory. <BR>I tryed to use something like : register ... Src="/Header.ascx" %&#062; to make reference to the file header.ascx that is in the root directory.<BR>in production it is ok, but in designing time I receive an error.<BR><BR>Please , what is the correct why of doint that ???<BR><BR>thanks ...<BR>