So after following numerous tutorials on zoning and doors I successfully made the starting room zombies to spawn but when activating another zone no zombies will spawn in the other zones even though there is a yellow line from the spawner to the zone.

Simple Explination

Start_zone

Zone1

Zone2

Door to zone1

Door to zone2

Zone 1 spawners


Please tell me if any of this is wrong

You set in door triggers enter_zone1, not enter_zone1_spawners

You set in door triggers enter_zone1, not enter_zone1_spawners

Even though naming the script_flag that seems 'wrong', he can name it whatever he likes as long as it matches his zones in his mapname.gsc...

You set in door triggers enter_zone1, not enter_zone1_spawners

I set it to enter_zone1 and re-compiled, and no spawners past the starting room, so I deleted all my zones, spawners, and doors and re-did them but still no spawners past the starting room.

Post the KVP's on your blocker, and more importantly the zones in your mapname.gsc dlc3_zone_init, it should match the KVP's you have in radiant and should look something like this -

dlc3_zone_init()
{
        add_adjacent_zone( "start_zone", "zone1", "enter_zone1" );
		add_adjacent_zone( "zone1", "zone2", "enter_zone2" );
		add_adjacent_zone( "zone2", "zone3", "enter_zone3" );
		add_adjacent_zone( "zone3", "zone4", "enter_zone4" );
		add_adjacent_zone( "zone4", "zone5", "enter_zone5" );

Also are all your spawners risers?

Post the KVP's on your blocker, and more importantly the zones in your mapname.gsc dlc3_zone_init, it should match the KVP's you have in radiant and should look something like this -

dlc3_zone_init()
{
        add_adjacent_zone( "start_zone", "zone1", "enter_zone1" );
		add_adjacent_zone( "zone1", "zone2", "enter_zone2" );
		add_adjacent_zone( "zone2", "zone3", "enter_zone3" );
		add_adjacent_zone( "zone3", "zone4", "enter_zone4" );
		add_adjacent_zone( "zone4", "zone5", "enter_zone5" );

Also are all your spawners risers?

I checked in the .gsc file and the zone do match up to radiant, and so far 2 risers in start_zone and 1 riser in zone1