Can't connect to friends server

[Rizon]

Hi there^^

Today i started to play Technic Craft and a friend of mine invited me to play it on a server. So i chose the Tekkit Minecraft on the launcher, downloaded all of it and started. We wanted to play on hamachi but even though i tested both versions 2.0 and 2.1 it still sais "Can't reach server". It seems like that i am the only one who has the problem because some other friends were able to connect to the server without problems :x. We are using hamachi and we are all in one network.

Also i have been looking on the forums already but couldn't find anything useful... So i hope you can help me ^^