What DISABLE_BROKER DOES ?

Dear all,

I generate a script from my database in order to be able to re create it manually.
The script contains a set of ALTER DATABASE statement at the beginning as follow:

ALTER DATABASE [RealEstateAgent] SET ANSI_NULL_DEFAULT OFF
GO
ALTER DATABASE [RealEstateAgent] SET ANSI_NULLS OFF
GO
ALTER DATABASE [RealEstateAgent] SET ANSI_PADDING OFF
GO
ALTER DATABASE [RealEstateAgent] SET ANSI_WARNINGS OFF
GO
ALTER DATABASE [RealEstateAgent] SET ARITHABORT OFF
GO
ALTER DATABASE [RealEstateAgent] SET AUTO_CLOSE OFF
GO
ALTER DATABASE [RealEstateAgent] SET AUTO_CREATE_STATISTICS ON
GO
ALTER DATABASE [RealEstateAgent] SET AUTO_SHRINK OFF
GO
ALTER DATABASE [RealEstateAgent] SET AUTO_UPDATE_STATISTICS ON
GO
ALTER DATABASE [RealEstateAgent] SET CURSOR_CLOSE_ON_COMMIT OFF
GO
ALTER DATABASE [RealEstateAgent] SET CURSOR_DEFAULT  GLOBAL
GO
ALTER DATABASE [RealEstateAgent] SET CONCAT_NULL_YIELDS_NULL OFF
GO
ALTER DATABASE [RealEstateAgent] SET NUMERIC_ROUNDABORT OFF
GO
ALTER DATABASE [RealEstateAgent] SET QUOTED_IDENTIFIER OFF
GO
ALTER DATABASE [RealEstateAgent] SET RECURSIVE_TRIGGERS OFF
GOALTER DATABASE [RealEstateAgent] SET  DISABLE_BROKER
GO
ALTER DATABASE [RealEstateAgent] SET AUTO_UPDATE_STATISTICS_ASYNC OFF
GO
ALTER DATABASE [RealEstateAgent] SET DATE_CORRELATION_OPTIMIZATION OFF
GO
ALTER DATABASE [RealEstateAgent] SET TRUSTWORTHY OFF

Then what is happening is that my script gets stuck or run for ever in the SET DISABLE_BROKER statement.
What does that really does, why it stop here ?

I ma not a DBA , I simple generate a single default script.

regards