plug in not working

Cubase Elements 10.30

Just getting started with installing plugins. I installed 64 bit versions of TAL Reverb 4 and SLAX compressor.
restarted cubase, was able to load plugins both inside track and as an FX track.
Both plugins load but they do not respond or process anythin in the associated tracks.
Anyone have experience in this, can’t figure out what’s wrong
Any help will be greatly appreciated