really? .100 at the end? I always write my full hamachi ip into the mc.txt and it works fine for me.
Well, write down your full hamachi ip without the .100 at the end and give it a try.
Don't forget, your friends need to do the same, and turn off your firewall.
Here is a basic list on making a hamachi server:
1. The other players have to be in your network
2. Turn off your firewall
3. Write down full hamachi ip into mc.txt, youself as well as other players.
4. Turn on the Ports.
5. Turn on server ( virtual pc)
The list is in no particular order.
That's basically it. Give it try