I crash when i open a world on almost all modpacks help?

[Coletastic555]

I really need help im getting mad please help! (if this is the wrong fourm to post this in im sorry im new)

2013-05-11 09:19:48 [SEVERE] [ForgeModLoader] The ForgeModLoader state engine has become corrupted. Probably, a state was missed by and invalid modification to a base classForgeModLoader depends on. This is a critical error and not recoverable. Investigate any modifications to base classes outside ofForgeModLoader, especially Optifine, to see if there are fixes available.

 

[titanblade828]

if you have optifine installed it crashes FTB try it without optifine and if all else fails try doing a force update and also are you running a 32 bit system or a 64 bit system if 32 then try updating to a 64 bit operating system as is could not be dedicating enough memory to run the launcher in 32 bit sorry I could not be more help as iv not had this problem myself so I don't have experience in solving this issue