Looks like the installer dumps the compressor in the users folder when it installs rather than the system folder. Which installation method are you using, the MSI or a manual installer?
Like the error message suggests, your Shockwave installation can't find "swadcmpr.x32" - perhaps the auto-download checkbox wasn't ticked when the file was published, or perhaps the auto-download URL fails to locate the xtra, or perhaps this xtra isn't included in the "full" installer, or ...
FWIW: my installation of SW11 has a copy at 'C:\Documents and Settings\<username>\Application Data\Adobe\Shockwave Player
Go to the adobe site and download the shockwave player , it will get loaded in the wrong place. They are placing it in the program files adobe file folder xtras. You will find the file SWADCmpr.X32, copy and then go to your system or system32 file folder, then to macromed, then shockwave and lastly Xtras. Paste the file and restart your computer. Thats how I got mine to work but I haven't figured out yet what happen to the sound.