How do you move archivelogs from one asm to another asm on standby site?

Somehow my archivelog is in the primary site ASM disk, but failed to shipped to standby site.

If I do
SQL>alter database recover managed standby database finish *
ERROR at line 1:
ORA-00283: recovery session canceled due to errors ORA-16171: RECOVER...FINISH not allowed due to gap for thr 2, seq 21-23

How could I move the logfile thread 2, seq 21-23 manually to the standby site????

I did

RMAN> copy archivelog '+DSG/prod8/2_21_679309728.dbf' to '/tmp/ temp.dbf';
Starting backup at 23-FEB-09
using target database control file instead of recovery catalog allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=1019 instance=PROD81 devtype=DISK allocated channel: ORA_DISK_2
channel ORA_DISK_2: sid=1018 instance=PROD81 devtype=DISK skipping archive log file +DSG/prod8/2_21_679309728.dbf; already backed up 1 time(s)
Finished backup at 23-FEB-09

It skips it, telling me it already backed up one time, how could I force it to copy again?

Thanks very much for your help Received on Mon Feb 23 2009 - 15:09:25 CST