Ok, I'm making several 'waves' of attacks from zerg forces.
Wave 1 - 5 creation Trigger:
zombies
Countdown timer is exactly 0 game seconds
wave 1 - 5 is set
modify countdown timer: set to 40 seconds
create 1 zergling at ones for player 8
wait 60 milliseconds
create lings
wait 60 milliseconds
order lings to attack
Preserve Trigger
Here's how I'm swapping to a next wave:
Humans
Wave 1 - 5 is set.
Player 8 brings at least 6 men to 'ones'
Wait for 200 milliseconds
Clear Wave 1 - 5
Kill all men for Player 5
Modify Countdown Timer: Set to 0 seconds
Display for current player: Waves 6 - 10!
Wait for 100 milliseconds
Set Wave 6 - 10
Here's the next wave trigger:
zombies
Countdown timer is exactly 0 game seconds
wave 6 - 10 is set
modify countdown timer: set to 60 seconds
create 1 zergling at ones for player 8
wait 60 milliseconds
create lings
{*]create hydra's
wait 60 milliseconds
order lings to attack
order hydra's to attack
Preserve Trigger
The next wave trigger never goes off and I don't know why..can someone help?
None.

>be faceless void >mfw I have no face
Are you running hyper triggers?
Red classic.
"In short, their absurdities are so extreme that it is painful even to quote them."

>be faceless void >mfw I have no face
Does the message from trigger two display?
Red classic.
"In short, their absurdities are so extreme that it is painful even to quote them."

>be faceless void >mfw I have no face
You won't be bring the 6 men to ones. Is the location big enough? Is there a player in the Humans slot?
Red classic.
"In short, their absurdities are so extreme that it is painful even to quote them."
I use the bring to detect how many of a unit I have in a certain location. The location is definitely large enough, and it did used to show the text before & now it doesn't.
There is a player in the humans slot, me.
None.

>be faceless void >mfw I have no face
OK so 5 waves go through, then nothing more happens?
Red classic.
"In short, their absurdities are so extreme that it is painful even to quote them."
No, it keeps going, it's just that it doesn't do the next set of waves. Basically, the first 5 waves keep repeating on and on.
None.

>be faceless void >mfw I have no face
Hmm, that's very odd. Make sure that you have the correct switches in the triggers? Maybe post the map.
Red classic.
"In short, their absurdities are so extreme that it is painful even to quote them."
I managed to fix it. It was another trigger's wait that messed it up.
None.