White Screen When Launching?

[SirPigglet]

I am getting a white screen every time I try to get into tekkit classic. It works on tekkit lite and regular minecraft. Please help. And yes i am running the latest version of java and my lwjg is updated.

[JohnnyMcQ]

I think u might be having problems whit you computer supporting the tekkit. jar file on your computer do u have at least a 6 GB of ram. but I may be not right because you say you other tekkit packs work.