2nd 350 deck won't link to TRAKTOR only one connects

Have you aggregated the CDJs?

Which OS are you running?

Running El Capitan and what is aggregated ...i.e. Set to midi 1 and midi 2

The CDJ/XDJ aggregator can be found here.

Agg loaded reads cdj350 set midi to ch1 and ch2 loaded TRAKTOR assigned tsi and still only controls one deck !

Loads of magic on YouTube with a number of gifted wizards that simply plug and play plus other sorcery assigning tsi etc none of which work either