--- Quote Start ---
I connect to the cable between Jtag cable and FPGA Jtag port. but i don't know how to use it in Quartus. when i connect it, there is no 'usb blaster', only 'usb serial converter'.
so i can't use it in programmer menu.
Please. What i have to do?
--- Quote End ---
I'm not exactly sure what you mean by 'it' ... have you connected a real Altera USB-Blaster? If so has the official Altera driver been installed for the USB-blaster, or is the installation picking up some other driver (like for a USB-serial converter) for that device?