I'm not sure I entirely follow your post but it sounds like your core issue is that you are not able to SSH into BT4 from your Win7 box. You had some other combinations of successes and failures in there but let's take a step back.
On your BT4 machine, run a "netstat -antp" and post the results.
Also, describe the steps you used to enable SSH on your BT4 image.


