SetPlayerObjectMaterialText (erorr 017/204) +REP

PHP Code:

---

public OnPlayerConnect(playerid)
{
 new objectx1;
 new objectx2;
 new objectx3;
 objectx1 = CreateObject(19371, 2052.00, -1897.51, 13.29,   0.00, 0.00, 270.40);
 objectx2 = CreateObject(19371, 1763.69, -1883.68, 14.19,   0.00, 0.00, 269.50);
 objectx3 = CreateObject(19371, 1189.26, -1127.10, 24.69,   0.00, 0.00, 0.52);
 SetPlayerObjectMaterialText(playerid, objectx1, "{FFFFFF}Welcome To server", 0, OBJECT_MATERIAL_SIZE_256x128,\
 "Arial", 28, 0, 0xFFFF8200, 0xFF000000, OBJECT_MATERIAL_TEXT_ALIGN_CENTER);
 SetPlayerObjectMaterialText(playerid, objectx2, "{FFFFFF}Welcome To server", 0, OBJECT_MATERIAL_SIZE_256x128,\
 "Arial", 28, 0, 0xFFFF8200, 0xFF000000, OBJECT_MATERIAL_TEXT_ALIGN_CENTER);
 SetPlayerObjectMaterialText(playerid, objectx3, "{FFFFFF}Welcome To server", 0, OBJECT_MATERIAL_SIZE_256x128,\
 "Arial", 28, 0, 0xFFFF8200, 0xFF000000, OBJECT_MATERIAL_TEXT_ALIGN_CENTER);
 Create3DTextLabel("rob a car and\n sell it here", green, -1933.1218, 562.3784, 35.8630, 50.0, 0, 0);
 return 1;
} 


---

Erorrs

Code:

---

C:\Users\DarkLight\Desktop\GTA\San andreas\DLTDM\filterscripts\textwall.pwn(36) : error 017: undefined symbol "SetPlayerObjectMaterialText"
C:\Users\DarkLigh\Desktop\GTA\San andreas\DLTDM\filterscripts\textwall.pwn(38) : error 017: undefined symbol "SetPlayerObjectMaterialText"
C:\Users\DarkLight\Desktop\GTA\San andreas\DLTDM\filterscripts\textwall.pwn(40) : error 017: undefined symbol "SetPlayerObjectMaterialText"
C:\Users\DarkLight\Desktop\GTA\San andreas\DLTDM\filterscripts\textwall.pwn(34) : warning 204: symbol is assigned a value that is never used: "objectx3"
C:\Users\DarkLight\Desktop\GTA\San andreas\DLTDM\filterscripts\textwall.pwn(33) : warning 204: symbol is assigned a value that is never used: "objectx2"
C:\Users\DarkLight\Desktop\GTA\San andreas\DLTDM\filterscripts\textwall.pwn(32) : warning 204: symbol is assigned a value that is never used: "objectx1"
Pawn compiler 3.2.3664                          Copyright (c) 1997-2006, ITB CompuPhase


3 Errors.

---

+ REP if you help me