DCMD Parameter Problem (array must be indexed (variable "aktion"))

dcmd_cmd(playerid, params[])
{
new aktion[4];
if(sscanf(params, "s", aktion)) { return SendClientMessage(playerid, weiss, "Benutzung: /cmd test"); }
if(aktion == "test")
{

} else
{
SendClientMessage(playerid, weiss, "Du hast den Parameter vergessen!");
}
return 1;
}

Zitat

array must be indexed (variable "aktion")

Zitat

warning 202: number of arguments does not match definition
error 033: array must be indexed (variable "-unknown-")

if(strcmp(aktion) == "test")