[Genious]

C:\Users\Dani\Desktop\A-RP\gamemodes\A-RP.pwn(1300) : error 017: undefined symbol "IsNumeric"

Код:

		{
		    if(response != 0)
			{
			    if(!IsNumeric(inputtext))
			        return	ShowPlayerDialog(playerid, 5, 1, "Create a Pickup", "Enter a model number to use for this pickup. (wiki.sa-mp.com)", "Enter", "Cancel");
				dini_IntSet(PlayerInfo[playerid][PickupRef], "Model", strval(inputtext));
				dini_IntSet(PlayerInfo[playerid][PickupRef], "Used", 1);
				ShowPlayerDialog(playerid, 6, 0, "Create a Pickup", "Your current location will be used to create this pickup.\r\nYou can edit it later.", "Enter", "Cancel");
			}
			else
				ShowPlayerDialog(playerid, 5, 1, "Create a Pickup", "Enter a model number to use for this pickup. (wiki.sa-mp.com)", "Enter", "Cancel");
		}

Please tell me what's wrong.. ??