HiFiBerry Amp+ Equaliser no effect


i just got a Hi-FiBerry Amp+ and its working fine apart from the equaliser has absolutely no effect on the sound.  I put some of them on 100 and some on 0 and it makes absolutely no difference.

I'm running on the following:
    Raspberry Pi 3
    Raspbian GNU/Linux 8 (jessie) Linux 4.4.50-v7+ #970

    ctl.equal {
      type equal;
      controls "/home/pi/.alsaequal.bin"

    pcm.plugequal {
      type equal;
      slave.pcm "plughw:0,0";
      controls "/home/pi/.alsaequal.bin"

    pcm.equal {
      type plug;
      slave.pcm plugequal;


aplay -l
    **** List of PLAYBACK Hardware Devices ****
    card 0: sndrpihifiberry [snd_rpi_hifiberry_amp], device 0: HifiBerry AMP HiFi tas5713-hifi-0 []
    Subdevices: 0/1
    Subdevice #0: subdevice #0


Thanks in advance


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