The backup should work fine, but the WITH MOVE should have the logical name like 'BOMA_Data' or 'BOMA_Log'. Whatever is in the sp_helpdb 'BOMA' results. It will list the logical filenames and you would use those.
OR
You could use the
RESTORE FILELISTONLY FROM DISK='c:\Bomacopy.bak'
and see the logical filenames you would use in the restore.
You are close, if you resolve the logical filenames then it will complete.