Sorry for the late reply, normally we reply within a day.
Don't know why this happened.
To make the service work:
There are 2 config files : Lansweeperservice.exe.config and web.config.
They both contain the connectionstring information to connect to the database. (server,databasename,username,password)
You can configure these config files how you like but the default values for version 3.5 are:
database: lansweeperdb
user: lansweeperuser
password: mysecretpassword0*
The service account for the service must be administrator on the scanned computers (typically a domain administrator)