this is was a Campaign script that dose not work

when I try to compile this script it says something something yada yada
so can any one tell me whats wrong with this script

(script startup
(sleep_until (volume_test_objects trig1 (players))0)
(ai_place Humans)
(sound_impulse_start sound\dialog\multiplayer1\In_Amber_Clad none 1)
(game_save)
(sleep_until (volume_test_objects area1 (players))0)
(ai_place cov1_area1/brutes_middle )
(ai_place cov1_area1/grunts_left )
(ai_place cov1_area1/grunts_right )
(ai_place cov1_area1/grunts_middle )
(sleep_until (volume_test_objects area2 (players))0)
(ai_place cov2_area2/brutes_right )
(ai_place cov2_area2/brutes_left )
(ai_place cov2_area2/grunts_right )
(ai_place cov2_area2/grunts_left )
(sleep_until (volume_test_objects area3 (players))0)
(ai_place cov3_area3/brutes_left )
(ai_place cov3_area3/grunts_right )
(ai_place cov3_area3/grunts_left )
(sleep_until (volume_test_objects area4 (players))0)
(ai_place cov4_area4/grunts_left )
(ai_place cov4_arae4/grunts_right )
(ai_place cov4_area4/brutes_right )
(ai_place hum4_area4/morgan_right )
(ai_place hum4_area4/elite_middle )
(ai_place hum4_area4/wunded_back )
(ai_place hum4_area4/dion_left )
(sleep_until (volume_test_objects area5 (players))0)
(ai_place cov5_area5/grunts_right )
(ai_place cov5_area5/grunts_left )
(ai_place cov5_area5/brutes_middle )
(sleep_until (volume_test_objects trig2 (players))0)
(ai_place cov2)
(game_save)
(sleep_until (volume_test_objects trig3 (players))0)
(ai_place cov3)
(game_save)
(sleep_until (volume_test_objects trig4 (players))0)
(ai_place cov4)
(sound_impulse_start sound\dialog\multiplayer1\Behold_A_Pale_Horse1 none 1)
(game_save)
(sleep_until (volume_test_objects trig5 (players))0)
(ai_place cov5)
(sound_impulse_start sound\dialog\multiplayer1\This_Is_The_Hour none 1)
(game_save)

I'm pretty sure
(sleep_until (volume_test_objects trig4 (players))0)
is meant to be
(sleep_until (volume_test_objects trig4 (players)) 0)

thanks ill try that