i have other problem to :S
when i give costum path TempDirectory method, it works without problem,
uploader.TempDirectory="D:\sites\mysite.com\httpdocs\ordertemp"
but when i try to give costum path SaveDirectory method, its not working
uploader.SaveDirectory="D:\sites\mysite.com\httpdocs\orders"
how can i give costum path ? please help me