I have downloaded a evaluation version of backup exec 12.5 from symantec.com, install it without enter any product key (the evaluation period has expired). I would like to know (I have placed order from the purchasing dept in my company but not yet received the perm. license). And now, I have uninstall the backup exec and try to use NT Backup, but seems backup exec cause NT backup can't recognize the backup tape even I use the new tape (never used in backup exec before). What I would like to try now is can I retrieve a evaluation key from my local sales, install backup exec again and use that evaluation key to extend the evaluation period until the perm. license received?