Well, according to the article rating, this is good serial port wrapper. Now, about your code. What result do you expect? You write something to the port, should device reply to this packet? You need to read this reply.
Download Portmon program (http://technet.microsoft.com/en-us/s.../bb896644.aspx) and see whether you send something to the port, and whether device replies. Set COM port parameters exactly according to device specification.
Run working program sample from the board vendor and see how it works in Portmon. Compare this with your program results - this can help to understand what happens.