Super old version, I know - but it worked until a server move.

Front end works fine, all normal but for the admin.php page. I'm getting a 500 server error. Tried chmod /conf to 777, 755, nothing.

Tried upgrading to the newest version, but gets caught when I try to overwrite basic_config.php (yes, the old /blogs was gone at this point).

Anyone have a tip on how to get around this? Great blog app, I hate to leave it but I'm at the end of my rope on what I think is probably a simple fix...

Much appreciated.