MrPoolman13

Ok so me and a couple of my friends want to play on a tekkit server. Of the 3 i am the only one who knows how to make a server. So i downloaded the tekkit server and launched it. I gave it 4gb of RAM before I launched. I joined and then it did the weird zoom in kinda thing before freezing and i had to force quit my launcher. Do I need to add more RAM? Would it help to run the server on a different computer? Thanks, I am Running mac OSX 10.7.5 and use portmap to port-forward.