Why don't SEAD assignments work in some terrains?

[Bodcap8 7]

I'm having an issue with SEAD assignments for other squadrons in some terrains that I downloaded from CombatACE.com

When I build a mission for my squadron -say a Strike mission- and assign other squadron(s) to perform a SEAD on my target area, they never engage, just fly on past the target area and head for their home base(s). It doesn't seem to make any difference what time on target value or anything else I try with the SEAD squadron assignment, they just won't attack SAM's or AAA's.

All of the terrains that I purchased and downloaded from Third Wire work fine. I can even get silly and assign 5 or 6 squadrons of 16 planes each to perform SEAD missions on my target area and they work fine, obliterating all SAM's and AAA's for miles around.

What the heck is going on with these other terrains?  What am I missing?

 

[+Major Bloodnok 465]

In the main.ini of the terrain:

 

[AllowedMissionTypes]
FriendlyMissionTypes=SWEEP,CAP,ESCORT,STRIKE,RECON,INTERCEPT,SEAD,ANTI_SHIP
EnemyMissionTypes=SWEEP,CAP,ESCORT,STRIKE,RECON,INTERCEPT,SEAD,ANTI_SHIP

 

 

[Wrench 9,851]

Maybe you should be telling us WHICH terrains have the issue? 

BTW, not all terrains have or use the "Allowed MIssions" statements. Therefore, ALL missions should be viable on those (if all the necessary AD units are present in the /GroundObjects folder)

[Bodcap8 7]

Thanks Major Bloodnok and Wrench.

One terrain I am having this issue with is "Angola/South-West Afrika". I made sure the [AllowedMissionTypes] included SEAD (which it does). Today, I built a Strike mission for my squadron and assigned various additional squadrons to perform SEAD on my target area (I varied the number of squadrons and the number of planes in each). All the aircraft I Assigned to SEAD have SEAD designated as their Primary or Secondary mission types.  All SEAD assignments worked on the first try, but when attempting to fly these saved missions again none of the SEAD assigned squadrons would attack the SAM's or AAA's, even though they were calling out 'spikes'.

I'm running full-four merged (no SF2NA).