I thought I would throw up a post in relation the connection issues I had with my 3DR and the PC while using the FTDI cable.
Straight out of the box I found (eventually) that the FTDI cable was wired incorrectly. To put it simply the orange and yellow wires were transposed.
The colour code should be;
Hope this helps
Thank you so much for posting this..thought I was going mad. Out the box same problem.