Backup Oracle windows

Hi guys, 

I have a question, i will backup database oracle ,  the  oracle on windows server when i try backup show the error result “Error while backing up Oracle Database. Error Details aFound File FC:\Windows\system32\ORASBT.dll]: Please rename this file so that Oracle can load Galaxy Installed Library rC:\Program Files\Commvault\ContentStore\Base\ORASBT.dll] for Backup/Restore.]. Please check the logs.”  what do I need to change in the library?