This is exactly the same post which you made yesterday in OraFAQ and I already answered there. You need to have SQL*Plus release 11.1 to make the use of sperrorlog defualt error logging table.
Command to make it work is "set errorlogging on;"
Link from Oracle docs : http://docs.oracle.com/cd/B28359_01/server.111/b31189/whatsnew.htm
You can see my demonstations here : http://www.orafaq.com/forum/t/189447/0/