Yes, there is a lot of VERY poor coding associated with the CS-B52 fuel system and engine failures associated with them:-

Switches NOT controlling valves!
Valves NOT controlling fuel flow!
Engines having NO idea where they are being fed from!

Keeping ALL valves open (as per Mark’s suggestion) does not work for me. Whenever any of the centre tanks empty (no matter whether they are isolated or not) I get flame outs.

My solution:- I have written a program which automatically restarts any flamed out engine/s.

How sloppy is that, a long term problem that needs addressing! >:(

EDIT: And i notice Mark still has the orange "Tank Sequence" warning light on where I suggestion the fix 12 Months ago and has still not been implemented! Fixed it in my installation.  ;)