error 010: invalid function or declaration

[fqzy]

C:\Users\\Desktop\bi-rp.pwn(35481) : warning 209: function "S@@_OnPlayerKeyStateChange" should return a value
C:\Users\\Desktop\bi-rp.pwn(35483) : error 010: invalid function or declaration
C:\Users\\Desktop\bi-rp.pwn(35485) : error 010: invalid function or declaration
C:\Users\\Desktop\bi-rp.pwn(35496) : error 010: invalid function or declaration
Pawn compiler 3.2.3664           Copyright (c) 1997-2006, ITB CompuPhase


3 Errors.

HELP NEKO PLS??

[Łuk@]

Pravila.