command line restore

I am trying to use the command line commands in a perl program.  I use the following commands:

 

to backup: 

bemcmd -o2 -j"job1" -sd"(tape drive name)" -s"(path to files for backup)" mp0 -r -w -v

 

to restore:

bemcmd -o39 -pa"(machinename\path of files backed up)" -w -v

 

I have the default switches to overwrite the media on a backup, I also have the media overwrite level set to 1(overwrite).

 

 The problem seems to be that I get a warning message about the media being over written during the backup, I say OK and it looks like the backup finishes OK.  When I try to restore the data, I get an error message that there is no record of the data base on the media.

 

When I do the same backup and restore using the GUI every thing works.  Do I need more information in eather the backup or restore commands??