Django / mod_wsgi / postgresql_psycopg2：无法连接身份验证失败（但在django runserver或dbshell下设置正常）

I'm deploying my django site on a Ubuntu 8.10 server that I've set up from scratch. I'm totally new to this so there may be plenty of stuff that I've missed, but happily have found my way through to the point of deploying a website.I'm deploying my django site on a Ubuntu 8.10 s