Dorin,
Not much detail there, but this may help. I have a machine just like yours and have no problems - mine even has drip feed installed and it works great.
1. For parameter settings I use this as a reference:
www.kfasllc.com/rs232_0.htm
2. For the wiring, it depends on what you want to do, simply send and recieve - or drip feed. This thread shows the most common wiring method:
http://www.cnczone.com/forums/showthread.php?t=66799
This has been discussed on this forum more times than you can count, if you don't get it working with that set-up and pin-out, just search for "RS232" and you'll get plenty of reading.
Rgds,
John B