Hello!!!
I finally fixed this issue easily....
what I did is first I added a driver to it.
next while I am trying upload it never uploaded.
so after various try and searcher I found my solution which is to select the old bootloader in the tool sections....
I thought it wont come, cuz my nano is new so that it would have a new bootloader but it seems it has a old bootloader.
so once I selected it it uploaded.
thank for all your support and help.
thanks. XD