I have just recently reformated the hard disk and install direct admin on it. I use to have SSL, i have backed up server.crt , server.csr and server.key
Now how do i restored my domain ssl without crashing direct with directadmin.
Those don't sound like the filenames DirectAdmin uses, so I assume your talking about the cert for apache?
If so you can do that for the domain/account in question from the user level of that account.