Thanks eried and Paul for answers. I want to clarify that I do not have problems sending/receiving data between the Arduino USB port and the laptop USB port (COM11).
If you re-read my first post here: The equivalent for ASCII char 1 is 49 DEC, ASC char F is 70 DEC, etc. My problem is when I try to read the same data from the Pins 0,1,14 of the Arduino board in another port of my laptop.
Let me explain you a bit better what I am pursuing here. I am planning to connect a device 1 and exchange data via USB Com with the Arduino. Then, taking advantage of the trigonometrical functions of the Arduino, do some calculations and finally send the results to a device 2 connected to the pins 0,1,14. In other words, to use the UNO as a bridge. Of course, the two devices tied to Arduino are enough intelligent.
Paul. I am far from my lab but I am pretty sure the three pins are connected to the laptop as follows (Crossover):
http://img402.imageshack.us/img402/6427/issue1.jpg
I've been working with microcontrollers like MSC-51 family since 1991 but this Arduino is new for me. Thank you.