Ok think i see the problem that diagram of the 5101 pinouts is incorrect ....
On the modem
pin 1 = TRST goes to pin 1 fcusb
pin 3 = TDI goes to pin 3 fcusb
pin 5 = TDO goes to pin 5 fcusb
pin 7 = TMS goes to pin 7 fcusb
pin 9 = TCK goes to pin 2 fcusb
then connect GND pin 10 on fcusb
So in your post #5 follow the number sequence with these to connect to your FCUSB board
On the modem
pin 1 = TRST goes to pin 1 fcusb
pin 3 = TDI goes to pin 3 fcusb
pin 5 = TDO goes to pin 5 fcusb
pin 7 = TMS goes to pin 7 fcusb
pin 9 = TCK goes to pin 2 fcusb
then connect GND pin 10 on fcusb
So in your post #5 follow the number sequence with these to connect to your FCUSB board