Do you backup your ACT!2009 DB regularly? If not, you should configure automatic backup.
Use ACT Scheduler to schedule automatic backup. Refer to this link on how to set it up.
I really suggest to store the backup in different place then where the ACT!2009 data is located. You might face some problems if you put in the default backup folder. Refer to this link for more information about this.
If somehow you decided to store the backup in other computer/server that needed login validation, you need to configure the ACT Scheduler Service to use proper login account. Click here to see how to do it.