that I had not put in a folder for bridging

But there's no such thing as a "folder for bridging" in SONAR.
- for bitbridge, it just works on any 32 bit plugin
- for jbridge (if that's what you're using) you just enable the plugin with a tickbox in the plugin manager
 
either way - you wouldn't set up a folder for bridged plugins. That is for *non SONAR* uses for jbridge.