Well, I removed quite a lot of QSECOFR passwords...
Try to boot in manual mode,
01 B M
and follow this...
http://www-01.ibm.com/support/docview.wss?uid=nas8N1019462
Resetting QSECOFR with an Attended IPL
Hoping that DST password is still QSECOFR/QSECOFR (usually it is so)