Symantec BE problem with Tape Drive

Dear  Team,

I had an issue with syamntec backup exec 2012:

1. SBE can not compress the backup when the cartridge and tape backup capabilities we already support for 
   compressed backups up to 1,6TB
2. Can not overwrite the cartridge so we had to reformat the cartridge if we do backup , 
   but with tools inherited from the NT backup server 2003 has been able to do these two issues

Tape Backup:  built in IBM HH LTO Gen 4

Cartridge Backup : IBM LTO4 PN 95P4436 800GB uncompressed/ 1.6T compressed

Server A is The BE were instaled, and Server B is one of file server we backup using Agent.

Thanks Before, and sorry for my bad english.

Regards

Joe