When I want to start a downloaded tekkit world, I just start world, I can hear sounds of some macerators for about 10 secs, then whole minecraft screen turns into white screen, I also changed Memory in Technic Launcher to 4Gb (I have 8Gb RAM) and all graphics settings are set to lowest, I don't know what to do.
There's video what happended :
https://www.youtube.com/watch?v=EvzXKmqCdoc