Texturepack Prevents FTB from Loading

[MCAK]

Hey,
I am currently using the direwolf20 1.5 modpack with a sphax texture pack. Up until today the texture pack was working fine, but now after the mojang logo appears the screen turns black and the game wont load. I removed the texture pack and the game works fine, but i really need a texture pack to play minecraft. The game also appears to work with the basic vanilla minecraft sphax pack, but not when i add the seperate files for the mods. Like i said everything was working fine up until today. Any help would be great, thank you.
Here is my console log.
http://pastebin.com/VaPKhN5m

 

[Gerald Huppertz]

Are you using Optifine?
Which extra texture pack addons are you adding to the Vanilla one?
Optifine has a texture limit of 1024 textures. Sphax Tinkers Construct has 3000+ textures and will cause the game to not load.
Well it does load, but it sits at a black screen for a very long time trying to load the textures, then sits even longer as it reverts to Vanilla textures and usually does load.

Just guessing, I'm at work and don't have access to pastebin here

 

[Ashzification]

First, update your Java. You're 35 updates behind.
Then post a new log.

Edit: Second: 1 GB of allocated RAM when using Sphax and you're asking for out of memory crashes. Allocate 2 GB

 

[MCAK]

how do i allocate more than 1gb? the launcher only lets me allocate up to 1gb.

 

[Gerald Huppertz]

If that is the case you are running 32 bit java, it has a 1GB limit.
Install 64 bit java!!!