MSD digital 6 problems

I got a 95 GSR and Just hooked up a new digital 6+ and car wont start. It starts fine when I unhook it. Power LED is on and all connections are solid. Hookup is correct, I double triple checked. The instructions say I may need PN 8910 or 8920 which is a tach / fuel inj. adaptor. Anyone have problems like this? Im stumped!