Best Answer Slysi , 08 February 2015 - 09:50
It means your missing a or some pbo files.
As Andrews said, delete your @Acre2 folder and the Acre dll you copied to your teamspeak plugins folder.
Re-download Acre2 from our downloads section.
Install @Acre2 to your Arma root directory, move the correct version of the Acre dll to your Teamspeak Plugins folder (and delete the unused one)
Make sure your running the correct version of TS and Acre2 for your windows version (IE 32bit or 64bit)
Make sure you run Arma and Teamspeak as administrator.Go to the full post