[NiteWave]

server level ext app lsphp

should change to
lsadmin console->Server->External App->lsphp5
to be more clear

to summary, external app lsphp defined at virtual host level can't set "Run On Start Up" to "suEXEC Daemon", otherwise 503 error. other values are ok.

Virtual Host Template >> PHP_SuEXEC
implement php suEXEC by:
External App:$VH_NAME_lsphp ->
suEXEC User:Not Set
suEXEC Group:Not Set

and

Security->ExtApp Set UID Mode: DocRoot UID