installation Franc3d

Hi all!

i got a problem with install franc3d!

i have downloaded cygwin(it is about 1.8Gb) and install it and launched
xwin server.(not from start button. i launched xwin.exe directly)

 then i opened cmd.exe and type ./franc3d 

but it could not be launched. i encountered with this error: "can not open display"

startxwin.bat is not in mentioned directory. what should i do?