How to multiple file delete from repeater control

System.ArgumentException: The path is not of a legal form.

For Each gvrow As RepeaterItem In rptBackups.Items
            Dim chkdelete As CheckBox = DirectCast(gvrow.FindControl("chkSelect"), CheckBox)
            If chkdelete.Checked Then
                Dim filePath As String = CType(sender, LinkButton).CommandArgument
                File.Delete(filePath)
                Response.Redirect(Request.Url.AbsoluteUri)
            End If
        Next

For Each MyControl As RepeaterItem In rptBackups.Items
           Dim filename As String = CType(MyControl.FindControl("Label1"), Label).Text
           Dim filePaths As String = "D:/FTP/DB Backup/" & filename
           Dim chkdelete As CheckBox = DirectCast(MyControl.FindControl("chkSelect"), CheckBox)
           If chkdelete.Checked Then
               File.Delete(filePaths)
           End If
       Next