[Crash problem on custom modpack]

Thanks for letting me know I made a new one there.

[Crash problem on custom modpack]

So I have just finished making a modpack but I seem to be having a problem with it it will open and run but sometimes in the middle of playing it will just crash. I cant seem to find whats causing it so if anyone could help that would be great!

Here is the link to the modpack

http://www.technicpack.net/modpack/the-power-within.637286

and here is a link to the last crash report that I had

http://pastebin.com/6Vg48XU0

Thanks!