No communication with V4

[Google Code Exporter]

What steps will reproduce the problem?
1. Connect BPv4 to the usb
2. Open Tera term or any terminal emulators
3. select baudrate 9600

What is the expected output? What do you see instead?
Open the port then press i. I intend to see information of the device, instead 
there is blind blinking of the cursor without any response

What version of the product are you using? On what operating system?
BPv4.0 from dangerous prototypes
host pc: x64 win7


Please provide any additional information below.

I am able to communicate with it on other computers not mine!

Original issue reported on code.google.com by [e-mail] on 25 Sep 2013 at 3:37