try like first reply told you..:
Code:
RegisterHam(Ham_Spawn, "player", "fwHamPlayerSpawnPost", 0)
public fwHamPlayerSpawnPost(id) {
if(is_user_connected(id))
if(get_gametime() - g_fRoundTime >= 40.0) {
return HAM_SUPERCEDE;
}
return PLUGIN_CONTINUE;
}