Private Pack - Launcher Loads pack fine then instantly quits at Minecraft Main Menu.

[GarageMinecraft]

Using Launcher Build 249 (this is latest unless choosing beta), have latest Java 7.21.

This has only started ever since we updated our pack on 15th, before the update it loaded in fine.

The issue is:

Launcher opens fine, pack is visible, it loads fine, gets past the Mojan screen and then reaches the Main Menu of minecraft and then instantly quits with no crash or error. No error in Console has it is loading up.

THIS WORKS FOR EVERYONE ELSE, EVEN RANDOMS JOINING, This is only affecting me so it cant be the Mod Pack

Others have either just updated or reset the pack and still works for them.

I have done everything I can think of:

Deleted everything minecraft wise in %appdata% (.minecrft and .technic)

Uninstalled and reinstalled Java 64bit and 32bit. (has been working for years with these both on)

Downloaded Technic Launcher Again.

Reset our pack MULTIPLE TIMES.

Grabbed a copy of .technic from a mate where it is working fine. Same Issue,. Loads and quits.

Win7 64bit sys

8GB

i5 Cpu

So it is not a resource issue.

Use IncreasPermGen Size and 4gb ram.

I think it might be a Java issue as on Sat 14th when this started it worked there for a bit after reinstalling Java but stopped for the night and Sunday Boom this is happening. I have since reinstalled Java even tried leaving either the 32bit or 64 bit out.