yes.. i used any block from forge multipart blocks.. so far.. same result.. and no codechickencore.. installed.. is that what caused the crashing?
but when i started up the MC (minecraft 1.7.10)... there wasn't a screen where it said that "codechickencore" are required.
EDIT: i have installed the CodeChickenCore to see if the problem is still there... so yes.. its the same result whenever i place any block from Forge multipart block on anywhere.. so it crashed.. and theres also a code that i dont know what it mean
"java.lang.VerifyError: Illegal type at constant pool entry 31 in class codechicken.multipart.scalatraits.TPartialOcclusionTile$class "
and i think its the java.. that caused the problem. i will make confirmation to see if my theory is correct or not.
sigh.. i tried Java 7 update 65 to see if it solved the problem... or still causing the same problem..
RESULT: it haven't solved the problem.. so that suggested the problem is in the mod.. because of the code.. "illegal type at constant poor entry 31" and it also said its invalid.