ok i think this is where the problem is:
someone said you need to recompile on development win64:
but i get errors
http://i.imgur.com/ocDaaPV.png
Error 1 error : All source files in module "Core" must include the same precompiled header first. Currently "E:\Program Files\Epic Games\4.8\Engine\Source\Runtime\Core\Private\CorePrivatePCH.h" is included by most of the source files. The following source files are not including "E:\Program Files\Epic Games\4.8\Engine\Source\Runtime\Core\Private\CorePrivatePCH.h" as their first include: E:\Program Files\Epic Games\4.8\Engine\Intermediate\ProjectFiles\EXEC UE4
Error 2 error MSB3075: The command "..\..\Build\BatchFiles\Rebuild.bat UE4Editor Win64 Development" exited with code 5. Please verify that you have sufficient rights to run this command. C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V120\Microsoft.MakeFile.Targets 43 5 UE4