I just got around to installing Komplete 7 (yes, that's right not 8) as I had it sitting around for a year - I had Komplete 6 installed previously. Everything seemed to go fine. When I tried to load Battery as a plug-in [Insert Synth...] I didn't see it in the list. So I went to the plug in manager and it's there (in the VST legacy wraps folder - and showing as enabled and enabled as a synth). The DLL file is there in the Cakewalk VST Plug-in folder. It runs fine as a stand-alone. When I brought up an old project that used battery, Sonar (Producer X1-d) couldn't find it.I've re-run the Plug-in manager a few times, but same story. All th eother Komplete entities work fine (as VST). I'm out of ideas - Any thoughts? Thanks in advance - Ron

Does service center tell you all your software is up 2 date? 

in addition to whats previously mentioned.. did you run b3 on it's own (stand alone)  BEFORE running it as a vst

also some drum maps are here

http://www.harmoniccycle.com/hc/music-13-drum_maps_SONAR.htm

Make sure to check Rescan Failed Plugins.

Did all those things - Re-ran the just downloaded update - ran it as a standalone - re-scanned both failed and successful plug-ins. Again, it shows it as an enabled successful plug-in in the plug-in mamnager

are you using 32 bit or 64 bit sonar.. your sig does not say..  are you using 32 bit or 64 bit battery?  what is the path of 32 bit battery on your hard disk?  what is the path of 64 bit battery on your hard disk?  where is the battery library located on your hard disk?

what is your version of windows?  

and just for kicks..  what's the path of sonar on your hard disk?  what's your audio card? what drivers are you using?