Lilypad programming - port problem

Hey guys, I recently bought the Arduino Lilypad with FTDI breakout. I connected it to the PC and board I set the LilyPad Arduino, but the port is still disabled. How do I solve this?

Did you install the FTDI drivers?

Well, recently I reinstall the system, so I haven't missed install the driver, so that's probably the problem. However I also tried Arduino UNO and it worked fine.

The Arduino UNO doesn't use an FTDI chip.

Ok, I'll install the driver and try it, but as I know, the Arduino Uno also has a FTDI chip.

I installed the driver and it works well. Thank you.