We were able to connect to the database server (which means your username and password is okay) but not able to select the s1wpde_singleapp
database.
s1wpde_singleapp
have permission to use the s1wpde_singleapp
database?username_s1wpde_singleapp
. Could that be the problem?If you don’t know how to set up a database you should contact your host. If all else fails you may find help at the WordPress Support Forums.