...
RMAN-03002: failure of recover command at 04/22/2009 20:02:50
RMAN-06053: unable to perform media recovery because of missing log
RMAN-06025: no backup of log thread 1 seq 4346 lowscn 150296436 found to restore
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SQL> select thread#,sequence# from v$log;

THREAD# SEQUENCE#
---------- ----------
1 4474
1 4472
1 4473
You don't have archive for log seq 4346; you need to do a PITR. You said you did a full hot backup but couldn't restore with the same, is your db in archivelog mode?