My minecraft isn't responding?

I just put the attack of the b-team modpack on my client minecraft and whenever i go to play i click on the mojang screen and it says not responding. What do i do?

Hope

Mojang got a brain and shut down that terrible game.

EnderWolf

You might not have enough memory (RAM). If you are using the technical launcher at the top right next to the exit button is a gear. Click on it. Next to memory you can allocate more memory. I think most of this pack require at least 2gig to run smoothly. Hopes it helps

wizard_of_amor