looks like your using ACE2 for ArmA 2 standalone. The ACE2 that updates frequently via six updater is meant for A2/OA= Combined Operations. If you do indeed only use ArmA 2 you need to remove all ACE2 mods in your directory and download the ACE2 for ArmA 2 straight from this site.
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Advanced Combat Environment 2 - Core
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Advanced Combat Environment 2 - eXtras (ACEX)
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Advanced Combat Environment 2 - SM
Also any further questions for ArmA 2 ACE 2 Standalone belong
here.