[Jafro]

I am getting this error when I am scripting. Please post the solution or the problem I made.
error 029: invalid expression, assumed zero

Код:

command(toggletravel, playerid, params[])
{
	#pragma unused params
	new string[128];
	if(Groups[Player[playerid][Group]][CommandTypes] == 11
	{
		if(TravelEnabled == 1)
		{
		    TravelEnabled = 0;
		    format(string, sizeof(string), "%s has disabled Travel.", Player[playerid][AdminName]);
		    SendClientMessageToAll(LIGHTRED, string);
		    AdminActionsLog(string);
		}
		else
		{
		    TravelEnabled = 1;
		    format(string, sizeof(string), "%s has enabled Travel.", Player[playerid][AdminName]);
		    SendClientMessageToAll(LIGHTRED, string);
		    AdminActionsLog(string);
		}
	}
	return 1;
)