connectionString.config is a standard connection string section. All providers use the ProviderDB connection string name. You might have to adjust this value to point to your instance of the provider database.
<!-- connection string to provider database
-->
<connectionStrings>
<add
name="ProviderDB"
connectionString="data source=.;Integrated Security=SSPI;Initial
Catalog=aspnetdb"
providerName="System.Data.SqlClient" />
</connectionStrings>