Hi,
Two other points about the REGEN:
1. The dash console message should have indicators that message if the tractor is actually "ready" or "not ready" for REGEN.
2. PTO has to be off, brake has to be set, transmission has to be in neutral.
Then find a nice shade tree and a cold drink because it will take some time (my 3038e takes about 20 minutes.)
Good luck!
-Matt
P.S. Clean the chaff out of the engine compartment because the DPF filter gets *hot*. Don't worry about odors and smells-- mine smells like a self-cleaning oven during parts of the cycle. :laugh: