Mixbus32c7 + AVA plugins not working

[calimerox]

Hi there, the title sais it all: 

Mixbus doesnt see the ava plugins: i see them apprearing while scanning, but then when i am in the plugin manager they do not appear to be there. 

any idea? I have a fresh manjaro linux install (arch based) tweaked for audio and all the other plugins work out of the box (u-he, overtone, everything..)

thanks!!