Erroare server

[[CS]C0sm1n.]

Am si eu o problema la un sv ! 

[pawn]C:\Documents and Settings\USER\Desktop\RXS\gamemodes\RST.pwn(1587) : error 017: undefined symbol "isnull"
C:\Documents and Settings\USER\Desktop\RXS\gamemodes\RST.pwn(4177) : error 017: undefined symbol "isnull"
C:\Documents and Settings\USER\Desktop\RXS\gamemodes\RST.pwn(4282) : error 017: undefined symbol "isnull"
C:\Documents and Settings\USER\Desktop\RXS\gamemodes\RST.pwn(5575) : error 017: undefined symbol "isnull"
C:\Documents and Settings\USER\Desktop\RXS\gamemodes\RST.pwn(5602) : error 017: undefined symbol "isnull"
C:\Documents and Settings\USER\Desktop\RXS\gamemodes\RST.pwn(9683) : error 017: undefined symbol "isnull"
C:\Documents and Settings\USER\Desktop\RXS\gamemodes\RST.pwn(10021) : error 017: undefined symbol "isnull"
Pawn compiler 3.2.3664	 	 	Copyright (c) 1997-2006, ITB CompuPhase


7 Errors.

Ma ajuta cineva si pe mine ?

[Grig22]

Adauga asta in partea de sus a GM/FS-ului :

#if !defined isnull
    #define isnull(%1) \
                ((!(%1[0])) || (((%1[0]) == '\1') && (!(%1[1]))))
#endif