How to Connect com1 in ASUS M/B

Hello to everybody.
I’m a student and tried to assemble my Personal Computer on my own.
Everything works fine but i still have some problems.
I must use the only one COM port motherboard has
but i haven’t the appropriate device to do that.

My MotherBoard is a P5VD2-VM ASUS M/B and need to know how to connect a 9 PIN D-SUB Female or a 25 PIN D-SUB MALE from the the appropriate COM 2 pin MotherBoard connector to the cable in order to use the com port.
ASUS says that i must purchase the Serial COM port module separately but i think that is a waste of time because i live in GREECE.

Is there anybody who wants to help me with the right idea ?

Thank you.

Vasilis.