Here are links to our most common issues that we see for Notion and Progression:
http://support.presonus.com/entries/45610890-No-playback-after-installing-Notion
http://support.presonus.com/entries/46523050-Problems-connecting-a-MIDI-interface-into-Notion-or-Progression
http://support.presonus.com/entries/45986524-General-VST-information-for-Notion-and-Progression
http://support.presonus.com/entries/46367800-Troubleshooting-VST-problems-in-Notion-and-Progression