HELP My Modpack keeps crashing

[Mk6200]

Hi I've been working on a modpack for a while now but it keeps crashing. I've sorted LOADS of id Crashes and now I just dont see why it doesnt work! Please help!

Here is the crash log:

https://www.dropbox.com/s/6o9bct2r9oobbru/crash-2013-12-25_12.21.46-client.txt

[TwoTails]

"TConstruct Environment: DO NOT REPORT THIS CRASH! Unsupported mods in environment: optifine"

You can't install TConstruct and Optifine or it will crash.

[Mk6200]

oh thank u!