eXus

Hi guys, Sorry if this question is in the wrong place.. I tried the search option. I have a server from a hosting company. Just started, I got it for the tekkit mod. In multicraft I selected the Tekkit mod. It is online and running but I can't connect with de the technic launcher. It says, server out of date en shows 1.3 I downloaded the launcher last week. Can someone help a new server owner and friends to play Tekkit... thanks!!1 exus.