GE..
The ship title contains underscores which you've not added. The title can be anything but the unit number line must be correct. Arizona is USS_Arizona_BB-39 so your unit entry must show this. Here's the sim.cfg line I have:
[fltsim.0]
title=USS_Arizona_BB-39
model=
texture=
.. and heres my AICarriers entry..
[formation.xx] -- replace xx with next consecutive number
title=USS Arizona -- This line can read anything you want
unit.0=USS_Arizona_BB-39, 0, 0 -- this line has to have the same description as the fltsim.0 title entry eg (USS_Arizona_BB-39)
ATB
DaveB