FFMPeg not loaded by Audacity

Hi,
Installed audacity 3.0.5 portable edition
downloaded FFMPeg 2.2.2 and put all files in
C:\PortableProgramFiles\Audacity\App\FFMPeg

I launch audacity and tried to import a AAC audio file. Audacity says I don't have FFMPeg.

edit->preferences->library says FFMPeg libary not found
i used the button to manually locate the avcodec-55.dll and save it.
but I won't take it, no error message, no happy message. just no change.
I restart the app several times, resetting each time the FFMPeg libary to no avail.

I found a file called AudacityPortable.ini and it contains this section:
[FileWrite3]
Type=INI
File=%PAL:DataDir%\Portable Settings\audacity.cfg
Section=FFmpeg
Key=FFmpegLibPath
Value=%PAL:AppDir:DoubleBackslash%\\FFmpeg\\avformat-55.dll

In file: audacity.cfg
I found this section:
[FFmpeg]
FFmpegLibPath=C:\\PortableProgramFiles\\Audacity\\App\\FFmpeg\\avformat-55.dll
Enabled=0

I changed Enabled from 0 to 1, it didn't fix the issue,
I did tools-> reset configuration, re-install ffmpeg, it didn't fix the issue,
I deleted audacity portable and installed it again somewhere else, re-install ffmpeg, didn't fix the issue,

what am I doing wrong?