David,

This should work correcly ...

if param1 = the up arrow
    process up arrow
    NODEFAULT
else
   if param1 = the down arrow
      process the down arrow
      NODEFAULT
   else
     baseclass::keypress(param1, param2)
     NODEFAULT && Default will have already been invoked by the baseclass
   endif
endif

If it does not, then there is something in your baseclass.keypress method that is suppressing default key handling.

Unless you need the key handling contained in the baseclass keypress method, simply avoid calling the baseclass method, and the abnormal key handling should go away.

If you need the key handling contained in the baseclass method, inspect the method carefully. It is doing something to suppress TAB and SHIFT-TAB.

regards,