Do you mean a mission or a skirmish?
If it is a skirmish, then you need to make sure Missions.rte/Index.ini has a line that mentions Skirmish Activities.ini and that it does not have // at the start of it.

No it's anything, it's AAL Tech v2, if you want, I can send the mod with the changes I made and you can see what I did wrong, this is addressed to anyone who wants to help.

I think that's the 11 character problem.
Look through it searching for the lines with PresetName and a following name that has a single word that is 11 characters or longer. Those are your problem.

I searched every index and there was nothing with PresetName, must be for the wrong build I guess. I got the mod from http://drop.io/AALExTech2 if anyone wants to look.
If anyone gets it and fixes it, can you please tell me

You have to search every .ini, not every index.

Oh, thats what I meant, yeah I searched every ini. in the mod

*Sighs*
Wait - I think my tinkered version is working. I'll see if I can hook you up.
EDIT:
The problem is in StakeOut.ini, line 78. I also meant InstanceNames, sorry about the confusion. Just add a space between the words Stake and Launcher and it should work fine.

Still doesn't work
Stakematerial is also over 11 characters, thats a problem too right?

If there's any way to upload a fixed version that would be cool, but I keep asking you for help, so you don't have to if it's too much work.

It's actually only the InstanceNames that have to be displayed that's the problem.
Hmm...
I'll try uploading it. But it could take a while on 2kb/s when it's 7mb.
EDIT: I know - I'll upload it without the sprites or sounds. That could cut down my upload time.
EDIT 2: Sweet, now it's only 168 kb - small enough for the forum uploader.
EDIT 3: Just extract this either into the cortex command folder or copy it into there from where you extracted it to. You'll need to have the old folder in there and you'll also need to click overwrite all or copy all or something like that.

Thank you! It works now, but not while I have AAL v3 running at the same time, but I can figure that out myself.

it doesnt work when you to the bombs menu, just freezes....

Find the underscores and switch them with spaces.

Ok, I managed to put the AAL v2 bombs in AAL v3, which is pretty cool IMO, now I'm trying to put the cruiser from another version of AAL in, but still having problems. Now its about an 'MPAM Wound In' not being defined or something. Its pretty small seeing as I don't need the rest of the mod, so if its in your interests and wouldn't bother you, could someone plz fix it or put it as a separate mod for me?
Download link:
viewtopic.php?f=83&t=10661&hilit=AAL+AAL+progress
And is it just me, or was that recently reuploaded? Is numgun back? That would be cool if he is.