Unexpected end of file?!? plz help..

[Cruzore]

void ActivateMonster(string &in asParent, string &in asChild, int alState);

SetNPCActive("Main", true);
it's a selfmade function, of course you need starting and ending brackets({ and }). Also, you don't put a ; at the end of the function name line.
Also, the command "SetNPCActive" doesn't exist. You use SetEntityActive instead.
Correction of it:

void ActivateMonster(string &in asParent, string &in asChild, int alState)
{
SetEntityActive("Main", true);
}