VBA Link connection problem (we need help :()

Greetings. I want to play Pokemon Fire Red with my friend but we can't connect our servers. It appears error code like as 100002

Operating system: Windows 7
Emulator: VBA Link 1.7.2 and 1.8
Rom: Pokemon Fire Red
VPN: Hamachi 1.0.2.4

1-) My friend and me opening vba link 1.7.2
2-) Both of us deselects pause when inactive window
3-) One of us opens vbaserver
4-) Server is selects player number to 2
5-) Server enters the ip it appears on vbaserver and clicks connnect
6-) It appears "player 1 connected" at the vbaserver screen

But our problem is when the other player tries to connect, it appears error message

Who can solve our problems ? We want to play with us please someone help us :(