Glad to help Simplicio.
I don't have yet used AJAX, stored your info on RegisterStartupScript for future use, thanks.

>Hi franco, you code really works . thank you for that. I would like to share some of other option when using AJAX since responce.write() cannot be use.
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>        string script = "<script language=\"Javascript\">\n";
>        script += "window.open('download.aspx')\n";
>        script += "</script>";
>
>        this.ClientScript.RegisterStartupScript(this.GetType(), "onload", script);
>
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