Fail to Install 2.0 in local

I want to upgrade to v2.0 beta from v1.9.  The build is successful. But when I run install script at my local XP, I get error at method
static IComponentRegistration BuildRegistration<TSettings>() where TSettings : ISettings, new() in
class DependencyRegistrar. The message is "An exception was thrown while invoking the constructor 'Void .ctor(Nop.Services.Configuration.ISettingService)' on type 'ConfigurationProvider`1'."

I use exist v1.9 database, uncheck
my settings.txt is as this

DataProvider: NopSqlConnection
DataConnectionString: Data Source=some;Initial Catalog=dbname;Integrated Security=False;Persist Security Info=False;User ID=xxx;Password=xxx;MultipleActiveResultSets=True"


Any idea?

Thanks,

Simon

Currently you have to install 2.00 BETA to an empty database. The upgrade utility (1.90 => 2.00) will be provided later

Thanks

It works if using empty database.