Index.php working fine all other posts/pages give a db connection error?!

Hi guys,

I’ve just transferred my domain to a new host (so the physical adress remains the same) and I’ve moved my database/files to the new server. Last night the migration was complete and my site appears to be fine. I can add new posts to the admin panel and create new posts just fine. But whenever I click on one of the posts I get the dreaded error:

Error establishing a database connection

I’m tripplechecked my wp-config and it appears to be right.. I can visit the index page and the admin panel so I don’t know what’s going on here. Any help would be really appreciated!