Ping works through ICMP, which isn't the same protocol as TCP or UDP. You can have all the usual ports closed but still ping successfully.
The good news is that you are seeing log entries on the host (the target Windows machine), so the port seems open and even the NSCP agent is getting something. This means you may not need to bring your network admin into the situation, which is good. Let's look at some of the errors:
I searched with that message and found an old forum post that could help. After that it's trying to bounce down through accepted SSL approaches but finding no common ground. Your monitor server gets across the water, but it doesn't have a passport.
Have you configured a password in the NSCP section of the Windows Registry? Start there and reply with your results.