WHEN I LAUNCH MY CUSTOM MODPACK, IT LAUNCHES THEN GOES BACK TO LAUNCHER.

[Mossbros]

This is my first time making a modpack, and it is unsuccessful.

I have been through loads of tutorials but non seem to fix my problem.

The problem is - not downloading the pack - but launching it. I press the "Play" button on the right hand side, briefly the 'Mojang' page appears, but then minecraft minimises and it returns to the Technic launcher.

 

Here is my modpack page: http://www.technicpack.net/modpack/details/164-necessary-mods.493800

 

Here is my modpack: https://www.dropbox.com/s/588uxtcsfwhabmn/Modpackz.zip?dl=0

 

And my crash report: https://www.dropbox.com/s/apmx58zsp0wzjnd/crash-2014-09-30_08.17.29-client.txt?dl=0

 

Note:

-Forge version 9.11.1.965 is installed (it's the latest)

-I have java 64-bit

-Modpack is minecraft version 1.6.4

-Pack is intended for Private use

 

[Brocyte]

Getting a 404 on the crash report.