Modpack crashes on launch after adding a mod

[MikePotato]

Title:

Modpack crashes on launch after adding a mod​

Launcher Version:

1.4.12​

Modpack:

Ethos Pack​

Modpack Version:

1.2​

Log Link:

http://paste.feed-the-beast.com/view/78c6df54​

Details of the issue:

I am using the "Etho Pack" modpack and i added a mod, immersive engineering. i downloaded it from the official site and added it to the pack.
now, every time i try to launch the pack, it crashes.
there is more info in the log (which i dont understand it) in lines 2539-2585.
if anyone knows how to fix this, please help me.​

 

[jikuja]

That won't work: Forge is too old.

Updating forge will not work: you need to update (almost) every mod which does things with fluids.

 

[MikePotato]

i updated them and i have an error now:
"forge mod loader has found a problem with your minecraft installation the mods and versions listed below could not be found
forge : [10.13.4.1448,10.14)"
EDIT: i put that forge version in ftb/libraries/net/minecraftforge/forge/1.7.10-10.13.4.1448
and it still says it could not be found.