hi,
some suggestions
make connection tests using Telnet
msdn.microsoft.com/.../hh165567(v=nav.71).aspx
Testing Your Connection
"HyperTerminal is no longer included with Windows. You can usually find a free downloadable version on the Internet. For more information, see What-happened-to-HyperTerminal. Alternatively, in Windows 7, you can turn on the Telnet Client feature. For more information, see Install Telnet Client."
verify if you have installed & started VT100 Plugin, ceck local firewall