Use SD in Toontrack Solo and see if the problem is still there.
Edit: Try changing Mute (39) to (54) and also uncheck "Record-start at MIDI" if you not using it.
Start SD and don't load or change anything within SD, Just "Learn" the crash hit and choke only and also try on other packs not just the ROCK SOLID Pack.
Don't load any of your old projects or anything at all just start from scratch, If it still doesn't work, Uninstall everything related with SD including packs and re-install, If again it doesn't work, There's nothing much I can do. you'll have to find someone else with the exact issue and using the same software you're using as I'm not able to replicate the problem you're having.