UltraVNC

Hello,
I am using SC to connect with my friend in India , When he double click on heldesk.exe file & click on my name , I get a message that " computer name with so and so IP wants to connect to you , when i click yes nothing appears on my screen , i mean i am not able to see his desktop. The IP i ...

I have 2 test machine both is behind firewall .Once i click on internet support (which is redirecting to my machine) ,winvnc icon stays on taskbar for few seconds & then wipes out.i looked on my firewall log ,it shows me that ip has been allowed access to my machine but nothing comes up on my ...

Ty for help.
but what IP or server address should i use for VNC server ??

I am trying to connect two pc for testing ultravnc single click.one machine is inside firewall & another one outside.I am trying port 5925 to connect.the machine behind firewall is support machine & outside firewall machine is remote machine.i opened port 5925 for any to my support machine IP ,i can ...