I have a FTDI cable and a Xbee adapter. I had this working(with a arduino/xbee on the other end) a couple of months ago and formatted my windows 7 system in the meantime so I am think the problem is related to the port/driver.
When the device is plugged in, the green led blinks at a regular rate(I think this is correct). When I open the comm port with either hyperterm or coolterm the LED goes off and sending +++ does not return an OK. At one point in my experimentation over the years, I thought there was something that needed to be done(OS-wise) to the comm port but I can't seem to find it.
Any ideas would be great.