Hamachi network problem

I have 3 PC’s with openSUSE 11.1 with hamachi working on them.
The problem is that when I use “hamachi list” command it shows me that there are 2 PC’s in the network :
I have checked on that 3rd PC and hamachi status is logged in.
I can ping that computer with hamachi IP but I can’t connect to is with NX Free.
On all tree computer I have same firewall settings etc.
Any ideas?